E.Voiskunsky, I.Lukodyanov. The Crew Of The Mekong --------------------------------------------------------------- Translated from the Russian by Leonard Stoklitsky First published 1974 (c) English translation, Mir Publishers, 1974 OCR: http://home.freeuk.com/russica2 ? http://home.freeuk.com/russica2 Original title: üËÉÐÁÖ "íÅËÏÎÇÁ" ? mekong.txt --------------------------------------------------------------- Being an account of the latest fantastic discoveries, happenings of the eighteenth century, mysteries of Matter, and adventures on land and at sea CONTENTS THE MERCURY HEART NAVAL LIEUTENANT FEDOR MATVEYEV A HALF-TWIST SPIRAL IPATY ISLAND I'll die if I don't see the Caspian. ALEXANDER VON HUMBOLDT 1 THE MERCURY HEART If you wish to subject an unknown substance to the action of an unknown force you must first study this substance. Honore de Balzac -LA PEAU DE CHAGRIN CHAPTER ONE IN WHICH A STRANGE OCCURRENCE TAKES PLACE ON BOARD THE M.S. UZBEKISTAN There is a great temptation to start a novel of adventure with a shipwreck. Something like this: "With a sickening crunch the three-masted bark Aretusa, sailing from the New Hebrides with a cargo of copra, listed heavily to starboard. The raging sea swept over-" But we did not yield to the temptation. This true story of ours will open without a shipwreck. Since we wish, however, to conform throughout to the dictates of good style, we solemnly promise to arrange one later on. So much for that. One fine summer day the m.s. Uzbekistan was approaching a large Caspian town. The time was shortly after lunch, and the promenade deck was deserted except for a man in a green check suit. He was taking his ease in a deck chair, sheltered from the broiling sun by an awning. Nikolai Opratin, a person destined to play no small role in this story, was a lean, dapper man in his late thirties. He had an energetic face, with a bony chin, thin lips and a high brow ending in a carefully concealed bald patch. His close-shaven cheeks and the aroma of his aftershave lotion created the impression that he had just stepped out of a barber's chair. Postprandial naps were a pernicious habit in which Nikolai Opratin did not indulge. He reclined in his deck chair, gazing at the ship's broad, foamy wake. On his right he could see the grayish-yellow strip of coastline rising out of the blue sea. The long hilly island at the entrance to the bay was already in sight. The island had been much smaller twenty years ago, Opratin reflected. Through the centuries the level of the ancient Caspian had often risen and fallen, sometimes by as much as eighty metres. In recent years it had dropped greatly. Man, no longer willing to be just a passive observer, had now set himself the difficult task of raising the level of the Caspian. One of the ideas suggested was to seal off, with a dam, the Bay of Kara-Bogaz-Gol, where the hot desert sun evaporates fourteen cubic kilometres of Caspian water annually. Another was to divert northern rivers into the Caspian. Under this bold scheme, the Kama, Vychegda and Pechora rivers were to be pumped across the watersheds and made to flow southwards into the Volga, which empties into the Caspian Sea. Even if Kara-Bogaz-Gol Bay were cut off from the sea, northern rivers diverted, and water from Central Asia's great Amu Darya river added, the level of the Caspian would not rise by the desired three metres before the year 2000. That was far too long to wait. Actually, the addition of only one thousand cubic kilometres of water to the Caspian in the course of one year would do the trick. But this was easier said than done. Several thousand giant pumps and a power station with a capacity of scores of millions of kilowatts would be required to shift that amount of water from the Black Sea, say, to the Caspian in one year. Nikolai Opratin, Candidate of Science (Tech.), had all these figures at his fingertips because he was the man in charge of the key aspect of a Caspian-level scheme at the Research Institute of Marine Physics. Although the level of the Caspian had dropped, the sea was still more than deep enough for the Uzbekistan. The town came into view, rising slowly out of the blue bay. Smokestacks and the delicate tracery of TV aerials could be seen with the naked eye. The decks now swarmed with passengers. Many were holiday-makers returning home from a cruise along the Volga. A trio of sailing enthusiasts leaned on the rail as they discussed the merits of a white sailboat that was overtaking the ship. Young men and women in blue jerseys with white numbers on their backs tirelessly took snapshots of one another. A husky, well-built man in a striped shirt worn over his trousers strolled along the deck with his plump wife on his arm. From time to time he paused to give a young photographer some pointers about which aperture to set and which shutter speed to use. "What a pity our holiday is coming to an end, Anatole," a woman somewhere behind Opratin remarked in a high-pitched voice. "Thank goodness it's over-that's what I say," a man's voice replied. "Just think of all the time lost." The voice struck Opratin as familiar. He turned round to see a slender young blonde in a red sun-dress, and a middle-aged man in a crumpled pongee suit. The man had a broad, large-featured face, puffy eyelids and an unruly shock of brown hair. The couple, deep in conversation, stopped by the rail not far from Opratin's deck chair. Opratin rose, straightened his jacket, and walked over to them. "Good afternoon, Benedictov," he said in a low voice. The man in the pongee suit stared at him coldly. "Ah, the expert who writes reviews," he remarked. He reeked of brandy. "I saw you in the restaurant during lunch but didn't venture to impose on you," said Opratin. He turned to Benedictov's companion with a slight bow. "My name is Nikolai Opratin." "How do you do," she replied. "I'm Rita Benedictov. I've heard about you." Opratin lifted the corners of his mouth in a smile. "I don't doubt it. Nothing very flattering, I'll wager." His tone was half-questioning, half-affirmative. The young woman merely shrugged. With the sun on her face, her brown eyes were warm and clear, but there was a hint of melancholy in them. "Were you on the Volga cruise too?" she asked. "No, I came aboard last night at Derbent. Business. By the way, a curious thing happened to me in Derbent-" A glance at Benedictov's face told Opratin that he couldn't care less about anything that had happened at Derbent. "Tut-tut, he still holds a grudge against me," Opratin thought. That spring a scientific journal had asked Nikolai Opratin to write a review of an article submitted for publication by a biophysicist named Anatole Benedictov. The article had impressed him. Benedictov began by analysing, in the light of modern physics, the phenomenon of ionophoresis, known since 1807 when Professor Reiss of Moscow discovered that drops of one liquid are capable of moving through another liquid. Further, Benedictov gave an account of his observations of fish having electric organs and cited interesting information about them. The electric ray, Torpedinidae, for example, generates 300 volts at eight amperes, and the electric eel, Electrophorus Electricus, as much as 600 volts. Benedictov maintained that such fish, Nature's largest living power generators, created an electric field the action of which makes water pass through their scales into their bodies. He had planted contacts in fish to measure differences in the action potential of the skin and the internal organs, and had concluded that under certain definite electrostatic conditions liquids penetrate through living tissue. Benedictov put forward the hypothesis that it would soon be possible to subject fish to special irradiation that would make them both penetrable and able to penetrate through solid matter when required. For example, fish would be able to pass freely through concrete dams on rivers. In his review Opratin had spoken highly of the fish experiments but had politely ridiculed the penetrability hypothesis. The editor of the journal had introduced him to Benedictov. Benedictov had disagreed with Opratin's conclusions, called the review "narrow-minded", and refused to let his article be published. All this had taken place about three and a half months earlier. Now the author and the reviewer were meeting for a second time. "There was no need to take offence, Benedictov," Opratin said mildly. "Your article had a lot of interesting points, as I noted in my review-" "I didn't take offence," Benedictov interrupted. "It's just that I don't think you- hm, well, that you know much about bioelectricity." Opratin took out his handkerchief and wiped his forehead. "Let's not argue about it," he said quietly. "You know more about some things and I know more about others. Isn't that so?" "In that case, stick to what you know and don't go poking your nose-" "Anatole, please," the woman said, putting her hand on her husband's arm. "I shouldn't have spoken to him," Opratin thought. "He's all keyed up." Aloud he said: "I have no intention of interfering in your affairs. I hope you'll finally realize your hypothesis is groundless. Ionophoresis and reciprocal penetrability of bodies are immeasurably far apart. Goodbye." Opratin made a dignified turn but before he had taken two steps Benedictov called to him. "Look here", he said. "Want a demonstration of penetrability?" "Stop it, Anatole," said the woman. "Don't, I beg you." Benedictov waved her aside. "Look!" He thrust his hand inside his shirt and drew out a knife. Opratin took an involuntary step backwards. The husky man in the striped shirt strode over to Benedictov. "Hey, none of that! Put that knife away." Benedictov ignored him. "Here's penetrability for you!" he exclaimed. He pushed up his left sleeve and slashed his forearm with the knife. Someone gave a stifled scream. A crowd started to gather. "See that?" Now Benedictov plunged the knife into his arm. The narrow blade, on which a wavy pattern was engraved, passed straight through his arm without even leaving a scratch on it. The crowd was struck dumb. Benedictov laughed. As he was putting the knife away the husky man stepped towards him again. "Give it here," he said. "I'll teach you to frighten people." He made a grab for the knife but his hand closed over emptiness. "Keep out of this!" Benedictov shouted. But the man twisted Benedictov's arm, and the knife dropped to the deck, dangerously near the edge. Several hands reached for it. The next instant a slim figure in a sleeveless red dress pushed forward through the crowd, ducked under the railing and dived down towards the water, six metres below. "Man overboard!" someone shouted. Life preservers plopped into the sea and lifeboat tackle began to creak. The ship started on a circle that would bring it back to the spot where the passenger had fallen overboard. But this turned out to be unnecessary. The white sailboat, then about a hundred metres from the ship, made a wild turn into the wind. Listing heavily, the boat raced towards the head bobbing among the waves. As the crowd looked on, a tall, bronzed young man dived into the sea. A few minutes later the red sun-dress was to be seen on the deck of the sailboat. The Uzbekistan approached the sailboat from the lee side. "Any help needed?" the officer of the watch called out. A woman's voice floated up. "No, thanks. They'll take me ashore." The passengers excitedly discussed the rescue. Cameras were focussed on the sailboat. Anatole Benedictov, his face white as a sheet, stood apart from the crowd. He gripped the railing and stared down fixedly at the sea. When Nikolai Opratin raised his head after looking in vain for the knife on deck his eyes met the intent gaze of the husky man. "A tricky little knife," the man remarked. "A pity the fishes will get it." Opratin turned away. CHAPTER TWO IN WHICH THE READER IS INVITED TO GO SAILING TOGETHER WITH THE MAIN CHARACTERS Now let us turn back the clock a few hours and shift the scene to the bazaar in that large town on the Caspian Sea. It was Sunday, and the bazaar was so thickly packed with people that it could have been described as a dense substance, all the constituent elements of which were in constant motion. Motivated by the law of supply and demand, buyers and sellers were attracted to one another like bodies possessing different electric charges. They moved towards one another, overcoming an opposing force, namely, different ideas about prices. Two tall young men strode quickly towards the bazaar. The tow-headed, blue-eyed man, whose name was Yura Kostyukov and who wore a bright red short-sleeved shirt and sand-coloured trousers, glanced at his watch. "It's a quarter to nine already. Val is probably waiting for us at the yacht club." "Let her wait," his friend Nikolai Potapkin said. "The worst that can happen is she'll give you a tongue-lashing." Nikolai had a high forehead, prominent cheekbones and a shock of dark hair. His grey eyes were calm and somewhat quizzical. The rolled-up sleeves of his white shirt revealed a pair of hairy muscular forearms. The two friends passed through an arched gateway and came out near a display of paintings, some of them executed on cardboard, some on oilcloth and some on polythene film. They were the kind of paintings you will see only at bazaars. Most of them were crude copies of well-known canvases. The two young men stopped in front of one of them which depicted a plump nude with pinkish-purple skin reclining on the bright blue surface of a pond beside a dazzlingly white swan. "Just look at that," Yura remarked. "What a wealth of colour!" "It's Leda and the swan, from Greek mythology," said Nikolai. Yura laughed. "You mean that fat lady is Leda, the Spartan beauty? The mother of Helen of Troy and Clytemnestra? The mother-in-law of King Menelaus and King Agamemnon?" "But look at how she's lying on the water," Nikolai said. At that moment a man in his forties, wearing large, horn-rimmed eyeglasses, with greying hair, plump tanned cheeks and a small pot-belly, came up to them. "Fie," he said in a low voice. "You ought to be ashamed of yourselves." The two young men turned round. "Why, it's Boris!" Yura exclaimed. "Fie," the plump man repeated. Boris Privalov was head of the department in which the two young men were employed as research engineers. "Staring at a nude!" "No- I'm intrigued by the way she's floating on top of the water," Nikolai said. "You might think she was lying on a sofa." Boris Privalov examined the pinkish-purple lady more closely. "H'm, yes, indeed. An extraordinary case of surface tension. But you didn't come here to buy a painting, did you?" "Of course not. We're looking for a pulley-block for our stay-sail halyard," Yura explained. "We were at the marina, giving the boat a onceover, and we saw a block had to be replaced. We couldn't find anything suitable in the store-room there. Dockmaster Mehti said we were getting to be as finicky as pampered lap dogs. He said that if we didn't like the block he offered us we could trot down to the bazaar for one. So that's that. Are you looking for anything in particular?" Before replying, Privalov glanced about. "No, just browsing, so to speak." "Do you suppose it would be possible to build up surface tension artificially?" Nikolai asked. "Build it up, you say?" "Yes." Nikolai put a finger on the blue surface of the water in the painting. "So that a person could stretch out on the water, the way she's doing." "But what for?" Nikolai lifted his shoulders. "I don't know. It simply occurred to me." "An interesting point," Privalov said after a pause, during which he glanced about again. "But first you would have to examine the question of just what a surface is in general." He looked first at Nikolai, then at Yura, then began to talk. He loved to discuss scientific problems, and when some point caught his fancy he could talk about it for hours. A cluster of people formed around them as first one passer-by stopped to listen, then a second, then a third. "Boris! Where've you disappeared to?" a woman's voice called. Privalov stopped short. "I'm here. Olga," he said to a round-faced, thick-set woman who was pushing her way towards him through the crowd. "I ran into a couple of my men-" "So I see." The woman glanced with distaste at the painting. "How could you stand here looking at that abomination?" "Good morning," said Yura, an earnest smile on his face. "You see, it's really our fault-" "How do you do," the woman replied. "Come, Boris. I've found a hand-chased copper jug for your collection-if someone hasn't snatched it up already." Privalov nodded to the two young men and followed his wife. But after a few steps he halted and squatted to examine a pile of metal junk. "Here's the block you're looking for, boys," he called. Nikolai came over to him, picked up the block and examined it. "It'll do," he said. "Boris!" Privalov's wife called. "Just a moment." Still squatting on his haunches, Privalov pushed his glasses up onto his forehead and studied a small bar of rusty iron that he had picked up. He tapped it with a forefinger. Nikolai paid for the block. With a wave of his hand the owner of the pile of junk threw in the bar of rusty iron for the same price. Privalov wrapped it in a page from a newspaper and put it in his pocket. "What do you want the piece of iron for?" Yura asked. "Oh, it just caught my eye. Well, so long, Siamese twins." "We're thinking of going out in the boat to take a look at the site," said Nikolai, lowering his voice. Privalov's face brightened. "That's a good idea, a wonderful idea, in fact. I was just- Wait a moment-" Ho stepped over to his wife and whispered something to her. "Of course not!" she exclaimed. "What talk can there be about the pipeline? Today's Sunday and everybody's off." "Sunday is a working day on the project because the power supply is better than on weekdays." "But you wanted to look for some old copper wares, Boris." "I'll get along meanwhile," Privalov said firmly. "Now don't fret, Olga. I'm sorry but I must go. I'll be back for dinner." With a sigh, Olga gazed reproachfully at her husband's back. Privalov and his young companions left the bazaar, took a trolleybus and in fifteen minutes reached the marina. A dark-haired girl in a white blouse and gay-coloured skirt was sitting on the edge of the pier dangling her tanned legs above the water and reading a book. When Yura caught sight of the girl he hastened out along the pier towards her. . "Hallo there, Val!" he called. The girl slammed her book shut and sprang to her feet. "You ought to be ashamed of yourself!" She snatched off her sunglasses to glare at Yura. "We made a date for eight o'clock and now it's going on for ten." "We had an urgent job to do for Mehti," Yura explained. "Val, I want you to meet Boris Privalov." Privalov held out his hand. "It's a pleasure," he said. "I've spoken with you on the phone. You're the girl who rings up Yura, aren't you?" Val smiled. "Why, yes. But maybe I'm not the only one." "Of course you're not," Nikolai put in. "Half of the girls in town ring him up." "Can I help it if I'm popular?" Yura asked plaintively. Val gave a giggle and pinched his arm. They went aboard a sailboat that was tied up at the pier. It had the name Mekong on its bows. Why was this Caspian boat named after that great river, 4,500 kilometres long, which flows through China, Burma, Laos, Thailand, Cambodia and Vietnam? Well, sailing enthusiasts prefer lyrical names like Orion and Sputnik to the old-fashioned Swift or Hurricane. The man formerly in charge of this white sailboat had taken a liking to the Greek word meconium, which conjured up some sort of mythological picture in his mind. But as soon as he painted this name on the bows he found himself the butt of curious jokes and innuendoes. Looking up the word, he learned that it was indeed Greek, but had nothing to do with mythology at all. He never showed up at the marina again. The boat was turned over to Nikolai and Yura. Instead of racking their brains for a totally new name they simply changed Meconium into Mekong. The stay-sail halyard block was quickly replaced by the new one. Soon after, the Mekong, heeling to starboard, was sweeping across the bay towards the sea. "Haul the sheets home!" commanded Nikolai, who was the skipper. Privalov had crewed for them for more than a year but he much preferred to spend his weekends at home on the sofa with a book. He did not turn up at the marina very often, although he liked sailing. After making fast the stay-sail sheet Privalov stretched out on the hot boards of the deck. How wonderful it was to lie there not thinking about anything, feeling the sun warm your bare back, watching the city with its hustle and bustle recede into the distance, and listen to the chatter and laughter of the two young men and the girl! How wonderful it would be not to think about anything! But the pipeline kept intruding. Quite some time had already passed since a bold project for laying an underwater pipeline between the mainland and the Neftianiye Reefs, a famous oilfield in the Caspian Sea, had been developed at Privalov's Oil Transportation Research Institute. It was an ingenious scheme that involved winding forty kilometres of pipes onto a gigantic wheel lying in the water just off the shore and then gradually unwinding the line and towing it to the Neftianiye Reefs. Meanwhile the oil extracted there was being shipped out in tankers. Privalov's plan had been approved, although many people thought it too risky. During the past week the pressure of affairs at the Institute had prevented Privalov from visiting the pipeline site. Running into Yura and Nikolai at the bazaar had been a piece of luck for him. A gentle northerly breeze carried the boat smoothly seawards. As he lay on his chest at the edge of the deck, Privalov reflectively observed the two resilient bow-waves formed by the boat. The Mekong seemed to be folding the water apart rather than cutting through it. The water was resisting. Surface tension. Privalov raised himself on his elbows and looked at Nikolai seated at the tiller. "Now listen," he said. "If strong enough, the surface tension of a liquid could replace a pipe." "I don't get it, Boris," said Nikolai. Yura, sitting on the other side with Val, moved his head, tightly bound in a red kerchief, from under the stay-sail and stared inquisitively at Privalov. "You don't get it?" Privalov reached over to his trousers, brought out his cigarette case and lit up. "Take an underwater pipeline. The oil is separated from the sea by the wall of the pipe. If we could make its surface tension strong enough, oil would flow in a separate stream, its own surface tension acting as a sort of film, or casing, and then you wouldn't need a pipe. See?" "That's fabulous!" Nikolai exclaimed. "A pipe-less pipeline! But how could you increase the tension?" Privalov lay back. "It's all out of this world," he said, screwing up his eyes against the sun. "Out of this world?" "Well, yes. Surfaces have specific properties that no one is able to control. Forget it. The whole thing's just a daydream." Privalov fell silent. He did not utter another word until their destination came into sight. The sailboat rounded the yellow tongue of the cape and headed for shore. They had to drop anchor about a hundred metres from the beach because the bay was too shallow for them to proceed any further. Privalov shaded his eyes with his hand and studied the structures on the beach. They were surrounded by barbed wire. "Might think we were in a desert," he muttered. "I had a feeling there's something wrong. Well, let's take a swim and go back home." It was mid-afternoon by the time they lifted anchor and set out on the return trip. Nikolai lay on the deck beside Privalov, his hand on the stay-sail sheet, watching a big white passenger ship overtake them. Yura was now at the tiller. Val was perched beside him. "Yura," she whispered. "Do you know if Nick has a girl friend?" "Why don't you ask him yourself?" Val laughed. "Oh, I couldn't. I'm afraid of him." After a pause she said, "You know my friend Zina, don't you? Let's introduce her to him." "Better riot," said Yura. "He's very choosy." Val frowned. "Humph!" she said with a pout. Yura struck up a song and Nikolai joined in. Sometimes they thought up their own words to popular songs, and sometimes they set poems to well-known tunes. Meanwhile, the ship had drawn abreast of the sailboat. "Look at the crowd on deck," Nikolai remarked. "Some sort of a brawl, judging by the way they're milling about." At that instant a slim figure in red plunged over the side of the ship. "Veer!" Nikolai shouted. Yura leaned on the tiller. The blocks creaked and the mainsail described a wide arc as it swung over to the other side. The boat, listing heavily to starboard, sped towards the ship. "Take it, Val! Brace yourself with your feet!" Nikolai gave the girl the stay-sail sheet and dived into the water. CHAPTER THREE IN WHICH OPRATIN TELLS PRIVALOV SOMETHING AND LEARNS SOMETHING IN PASSING Towards the end of the day Privalov's old friend Pavel Koltukhov, the Institute's chief engineer, dropped in to see him. "Looks like smooth sailing at last, Boris," he said, sitting down and stretching out his legs. "Work will be resumed at the site tomorrow." "Thank goodness!" Privalov flung himself back in his chair. "Those self-styled efficiency experts! To claim that it's cheaper to transport oil by tanker than by pipeline! But they forgot that tankers return empty. They close their eyes to the cost of taking on ballast water and then discharging it. To say nothing of the number of stormy days on the Caspian." Koltukhov nodded his bald head in agreement. Then he stuck a cigarette between his lips and gave Privalov a sharp glance from beneath beetling eyebrows. "You don't have to persuade me a pipeline is better," he said. He walked over to a big map of the Caspian hanging on the wall. "Forty kilometres of pipeline," he said. "Three more parallel pipelines will make it a total of 160 kilometres. A pipeline across the whole of the Caspian will add another 300 kilometres. We'll be paving the floor of the Caspian with steel." "We'll be paving it with millions of roubles too," Privalov added, joining Koltukhov in front of the map. "Here we are in the twentieth century and the only way we know of transporting liquids is through pipes, just like in the first century." Koltukhov chewed his lip. "Have you read Arshavin's latest article?" he asked. "About towing oil across the sea in containers made of thin polythene film? Yes, I've read it." "Not a bad idea," Koltukhov remarked. "It's been picked up abroad. So don't say we don't know how to transport liquid goods." "There's an idea that keeps preying on my mind." said Privalov. "It concerns the physics of surfaces. All surfaces possess energy, don't they? Suppose we found a way of using this energy to alter the properties of surface tension. I mean, building up surface tension to such a degree that a stream of oil would be contained in a 'skin' of its own surface." "Where'd you get that idea?" "At the bazaar." Privalov told Koltukhov the gist of his talk with the two young engineers. "Why, I see you're just an old day-dreamer." Koltukhov gave a short laugh. "You'll lead those young men of yours astray. I'd advise you not to read Jules Verne the last thing before going to sleep." "Oh, all right, all right." "You're too long in the tooth for that sort of thing, Boris." "What's age got to do with it? I read what I like, and I like Jules Verne. He's refreshing." The telephone rang. Privalov lifted the receiver. "Yes? How do you do. Certainly you may." He put down the receiver. "Opratin from Marine Physics is dropping in." "Oh, our old acquaintance. Do you see much of him?" "No, not really. I'm better acquainted with the surveyors from that outfit. They're helping us to lay out the route." Koltukhov glanced out of the window at the building of the Marine Physics Institute on the other side of the street. He watched a lean man in a straw hat step out of the front door and stride quickly across the street. "Our neighbour's in a hurry," he remarked. "They say he's efficient. I'll wager he hasn't read Jules Verne since he was a boy." A few minutes later there was a knock on the door. "Come in," Privalov said. Opratin opened the door and, removing his hat, stepped into the room. He smoothed down his thinning hair. "How have you been keeping?" he asked Koltukhov. "Haven't seen you for some time. How are things?" "Not so bad." When talking with visitors Koltukhov liked to give the impression that he was just a "plain, down-to-earth Voronezh peasant", as he put it. And he really did come from Voronezh peasant stock. "I spend my time making the rounds and giving advice." "Still dabbling in resins and plastics"? "We executives don't have much time for anything except organizational matters," Koltukhov said with an apologetic note. "But I do have a cubbyhole of my own, with mixers, thermostats and a press. Whenever I see a couple of young men engaged in idle conversation in the corridor I punish them by recruiting them to help me make a couple of plastic models. Besides, you know, those resins have an awful smell." After a slight pause he said, "I hear you had quite an adventure." Opratin chose to be noncommittal. "Really?" "Your director told me you fell into a pit in Derbent while on a business trip and had to prolong your stay there." A shadow flitted across Opratin's face. "Yes," he said, "I did run into a bit of unpleasantness." Koltukhov glanced at his watch. "Well, I'll leave you two together now. It's time I was off." He nodded to the two men and walked unhurriedly to the door. The name of the old Caspian town of Derbent means "Iron Gates". The town once guarded the narrowest place on a caravan route running between the mountains and the sea. Nikolai Opratin had been sent there to examine the ruins of fortress walls in order to obtain more precise information about the level of the Caspian in ancient times. On his last day in Derbent Opratin wandered into an old stone quarry on the deserted shore. While clambering about the quarry he caught his foot in a fissure. Suddenly the rocks gave way. His heart missed a heat as lie felt himself falling into nothingness. He landed with a splash in a pool of mud about a dozen feet below. He picked himself up and paused to catch his breath. Just a moment ago, a hot blue sky had stretched above him; now he was surrounded by musty semi-darkness. He took out his flashlight and swept its beam to right and left. He saw damp, moss-covered walls. This prompted the thought that he had probably fallen into the underground passage that had once connected the Naryn Kale Fortress with the sea. The passage was mentioned in legends but so far no one had been able to find it. The flashlight beam moved downwards. Opratin was a self-possessed man, but the sight of a human skeleton filled him with horror. He turned to flee and stumbled into a pool of cold water. This brought him to his senses. Besides, whom was he fleeing from? He returned to the skeleton, to which the remnants of clothing still clung. The poor devil must have fallen into the passage and been crushed by rocks. Opratin's flashlight picked out a half-rotten sack. He gave the sack a push with his shoe. A gun fell out of it. "It's a German pistol, a Luger," Opratin said to himself. "How odd!" Poking through the contents of the sack he found a portable radio transmitter, several sticks of dynamite and some cartridges covered with green mould. He turned his flashlight back on the skeleton. Something sparkled in the neck of the torn shirt. Bending down to take a closer look, he saw a shiny metal chain on which hung a small crucifix and a flat rectangle of iron with letters on it. Opratin wiped the iron rectangle with a corner of the sack and read: A M D G Below these were smaller letters. Only a Catholic would wear a crucifix round his neck, Opratin reflected. How long had the man lain there? Then suddenly he came out of his reverie. He certainly had no intention of becoming a corpse to keep the skeleton company. He picked up the pistol, saw that it was in working order, and fired at the spot of blue sky above his head. Minutes passed, minutes that seemed hours to Opratin. He fired again. The passage rumbled like an active volcano, but no sound came from above. Opratin fired again and again until all the cartridges were gone. Breathing heavily, he leaned against the damp wall. Despair swept over him. Suddenly he heard alarmed voices overhead. He shouted. Choking from the stench of the passage and the smell of gunpowder, he shouted until he was hoarse. The faint light from above was blotted out by a head that appeared in the opening. "Who fired those shots?" a voice demanded from above. A few minutes later a rope was lowered through the hole and Opratin was hauled out. Opratin had to postpone his departure while he answered questions put by the local authorities and set forth the whole matter in writing. That was a nuisance, for Opratin hated to waste time. Nikolai and Yura sat side by side at a desk, bent over a blueprint of the pipeline route. They were checking the figures indicating the depths. Valery Gorbachevsky, a young lab technician, glanced at his watch, then walked over to the mirror and smoothed down his black sideburns and moustache, meanwhile singing a song about a lad named Chico who came from Puerto Rico. "My dear Valery," said Yura, "do you know where Puerto Rico is?" The lab technician shrugged a shoulder. "Of course. You don't doubt it, do you?" "Not very far from Madagascar, isn't it?" "Well, yes, you could put it like that," Valery said hesitatingly. "Now you see, my friend, how disastrous it is-" Just then the telephone rang, and Yura broke off to pick up the receiver. "The chief wants you, Nikolai. With the route plan." Nikolai went up to the next floor, taking the steps two at a time, and entered Privalov's office. Privalov had a visitor, a man in a green suit, whom Nikolai had never seen before. The visitor gave Nikolai a keen glance, nodded and said, "My name's Nikolai Opratin." Nikolai introduced himself and sat down. "Nikolai Opratin comes from the Institute of Marine Physics across the street," Privalov said to Nikolai. "He has given me some interesting information which we will have to take into account. Yes, indeed." Here Privalov pushed his glasses up onto his forehead and bent over the plan of the pipeline route. "Now take this shoal that's to be deepened by blasting." Opratin crossed his legs. "That won't be necessary," he said with a glance at Nikolai. "I've just told your chief the level of the Caspian will rise in three years' time. That means there isn't any need to deepen the route." "Is your information reliable?" Opratin smiled. "The most reliable there is." Privalov leaned back in his chair. His glasses slid down to the tip of his hose. "Well, we'll just have to revise our calculations," he said, rubbing his forehead. "I'd like you to step over to the Institute of Marine Physics tomorrow, Nikolai. Will that be all right?" he asked, turning to Opratin. "Certainly. After lunch, preferably." "Fine. You can't imagine how much worry this pipeline is causing us. Doubting Thomases are holding up the work. We visited the site last Sunday and-oh, well, you understand." Opratin nodded sympathetically. "Yes, I do. By the way, I didn't know you went in for sailing." '"Indeed?" "I saw you in a sailboat last Sunday." "Where were you?" "Aboard the Uzbekistan." "Well, well. Why did you drop a lady overboard?" Opratin's thin lips spread in a faint smile. "It wasn't me who dropped her," he said. "There was some sort of row on deck. I don't know whether she was pushed overboard or just fell in. It seemed to me she was holding some metal object in her hand." "A metal object?" Privalov glanced at Nikolai. "Did you see anything like that when you fished her out of the sea?" "The only metal I saw was the buckles of her sandals." Opratin rose. "Anyway, there was something else about that particular spot besides the rescue of the lady. I saw bubbles rising to the surface. Could have been natural gas, couldn't it?" "It could. You ought to inform the gas experts." "How can I if I don't know the exact spot? It's not like on shore, where you have landmarks." "If I remember rightly, the TV tower was straight ahead of us at that moment," said Nikolai. "The refrigeration plant was at right angles to it. The No. 18 buoy in the channel was about a hundred metres to the north. Those points should be enough to find it, I think." "Thank you," said Opratin. "I'll be expecting you tomorrow." He said goodbye and left. CHAPTER FOUR ABOUT A DROP THAT WAS DROP-SHAPED They left the Institute together and walked down the street in the bright sunshine. "Why do you think she fell overboard, Yura?" Nikolai asked. Yura grinned. "Beware of women who fall overboard. I shouldn't rescue them if I were you." "Oh, shut up," Nikolai growled, and quickened his steps. The woman in the red sun-dress was not exactly preying on his mind, but there was something about her narrow, dark-eyed face, framed in fair hair, that vaguely disturbed him. He had a feeling he had seen that face somewhere before. She was, of course, an unusual woman. She had not shown a trace of fear in the sea. When he swam over to her she had said, "No need to rescue me. I'm a good swimmer." By that time the sailboat was beside them. Yura had heeled into the wind so sharply that the starboard side was level with the water and Nikolai did not even have to help the woman climb into the boat. She thanked them politely, her gaze on a point somewhere between Privalov and the mast, wrung out her dripping hair and then went down into the cabin. Val came out of the cabin with the red sun-dress and hung it up to dry in the sun. When the boat reached the marina the woman sprang gracefully onto the pier. "Please don't trouble yourselves," she said. "I'll get home all right without any help." Her red dress flashed among the trees on the seaside promenade and vanished. That was the last they saw of her. The two men turned oft the bustling avenue into quiet Cooper Lane. "Will you come in for a while?" Nikolai asked, stopping under an archway that led into a courtyard. "Can you lend me something to read?" "Of course I can." They crossed the yard diagonally. It was a yard they had known from childhood, with a glassed-in gallery running the length of the two-storey house. An outside stairway supported by iron posts, down which it had been so convenient and pleasant to slide, led up to the top floor. In the cellar the children used to hunt for buried treasure and hide from pursuit, sending arrows flying through the air. Yura and Nikolai had grown up in this wonderful courtyard which could be turned, in the twinkling of an eye, into a prairie or the deck of a frigate. Here they had invented their earliest games and read their first books. They had raced about the yard, shooting arrows from their bows and lassoing the rubber plants set out for watering. One of the ground-floor tenants in those days was a sailor. The boys used to gaze respectfully at his black cap with its gold emblem and the gold stripes on his sleeve. The sailor would be away for weeks at a lime, leaving behind, at home, a live turtle and a daughter with freckles and yellow braids. Although girls were not invited to play Red Indians, Yura and Nikolai made an exception in the case of the sailor's daughter. Yellow Lynx, as they named her, could run like the wind and slide down the stairway posts like a cat. She did not cry when they pulled her by her braids. She plunged courageously into courtyard battles, using her fingernails and screaming in a high, piercing voice. Besides the live turtle there were other interesting things in the sailor's flat. A real dirk hung on one wall and a barometer on another. On the desk, beside a bronze inkwell, lay two pieces of iron with mysterious letters carved on them. Yellow Lynx and the boys resolved that some day they would discover the meaning of those mysterious letters. The sailor and his daughter left for Leningrad early in the spring of 1941. Nikolai copied a picture from a volume of Pushkin's Tales showing a ship with a huge taut sail decorated with a drawing of the sun, approaching a wharf on which men in old-fashioned long robes were firing cannons. He presented it to Yellow Lynx as a farewell gift. They were both about nine years old at the time. Soon after, a husky young man by the name of Bugrov, whom the boys addressed as Uncle Vova, moved into the sailor's flat. He had a blue motorcycle on which he sometimes took the boys riding. What is more, he taught them the Greco-Roman style of wrestling. A circus poster on the wall of the new tenant's room showed him among the other performers, very handsome and muscular in black tights, his chest bulging. When the war broke out Uncle Vova locked up his flat and went into the army. Nikolai's father, who worked at a railway-carriage repair shop, was also drafted. Yura's father, an oil refinery engineer, was given a draft deferment. Now the boys played army scouts and guerrillas. Life was hard, especially for Nikolai and his mother, who was a nurse and worked day and night at an army hospital. Nikolai's father was killed in a battle on the Dnieper River. After seven years of schooling Nikolai told his mother that he wanted to go to work. She tried to persuade him to stay in school but he would not be moved. Yura's father found a job for Nikolai as an apprentice fitter in the oil refinery's maintenance shop and persuaded him to attend night school. Soon after, Yura's family moved to another part of town and Nikolai was left without a playmate. But this did not matter because he had no time for play. Yura felt that fate had been unkind to him for making him sit over his books all through the war instead of letting him fight the Nazis. Besides, he envied Nikolai's hands, with their traces of grease and metallic dust. And so, after finishing the eighth grade at school Yura went to work in the maintenance shop, side by side with Nikolai. They went through night school together and then entered the evening department of a college. Shortly after graduating with degrees in engineering the two young men were assigned to jobs in the Oil Transportation Research Institute, where they worked under Boris Privalov. They crossed the courtyard, climbed the stairs, walked down the glassed-in gallery and entered Nikolai's room. There, it was pleasantly cool. Bookshelves lined the wall above Nikolai's desk. A photographic enlarger stood on the floor in a corner of the room, like a stork on one leg. Yura picked up the underwater gun Nikolai was making and examined it. "The spring's a bit tight." "No, it's just right," said Nikolai. "Can't have it any looser." "If you finish it by Sunday we can do some shooting." "We're racing on Sunday." "Why, so we are. I forgot." Yura stretched out luxuriously on the sofa. "I want you to look at this," said Nikolai, producing several sheets of paper covered with sketches and figures from a drawer of the desk. "What do you think of it?" Yura glanced at the sketches. "They look like pears." He yawned. "Take these drawings away. I'm too lazy to think." "But first listen. Remember that conversation about surface tension and the interesting idea Privalov suggested?" "He told us to forget it." Nikolai lost his temper. "You're an idiot! I can't discuss anything with you nowadays. All you can think of is Val." "You're the idiot," Yura replied cheerfully. "All right, let's have it." Nikolai turned on the fan. "What shape does a liquid have?" he asked, lighting a cigarette. Yura lifted his eyebrows. "It takes the shape of the vessel into which it's poured. Primitive man guessed that much." "Very well. Now take a drop of liquid. What keeps the liquid in a droplet? Surface tension. No vessel is needed. A sphere is the ideal shape of a minimum surface. But a droplet is not spherical. The earth's gravity gives it a bulge, making it pear-shaped." "In short, a drop-like shape." "Exactly." There was a knock on the door. A tall, husky man in a white singlet and blue jeans entered. He had a broad, heavy-jawed face, and there was a tuft of red hair on top of his head. "Caught you in at last, Nikolai," he said in a deep, hoarse voice. "Where've you been hiding?" "What can I do for you, Uncle Vova?" Nikolai asked. "I want to borrow your aqualung for a couple of days." "My diving gear?" "Don't worry, you'll get it back in perfect condition," he said reassuringly, 'I'll refill the cylinders too." "All right, take it," Uncle Vova picked up the aqualung and inspected it. "Fine workmanship," he remarked. "Thanks." "When did you return?" asked Nikolai. "Sunday. By the way, I saw you pull that girl out of the sea. You made a neat job of it." "Why, it looks as though the whole town saw it." "Really?" Uncle Vova pricked up his ears. "Who else?" "The whole ship. You were on the Uzbekistan too, weren't you?" "Oh, I don't give a damn about the Uzbekistan" Uncle Vova replied vaguely. "Well, I'm off." He nodded and went out. "Now Yura, listen to what-" At this point Nikolai noticed that Yura, his long legs hanging over the edge of the sofa, was sound asleep. Nikolai shook him by the shoulder. Yura jerked a leg and pushed his friend away without opening his eyes. "Wake up this instant or I'll shake the life out of you!" Nikolai shouted. Yura opened his eyes. "I must have dozed for a moment," he remarked with a conciliatory smile. "You certainly did. Get off the sofa." "I'm more comfortable on it. You can continue talking. We stopped on droplets being droplet-shaped. It sounds fascinating." "Are you trying to be funny?" "Not 'for the world." "Then listen. The size of a droplet depends on the magnitude of the surface tension. In the case of water"-Nikolai glanced at his notes- "the surface tension is 72.8 ergs per square centimetre. The surface tension of alcohol is a little more than 22 ergs." "What is it for mercury?" "Mercury? Just a minute." Nikolai took down a thick reference book from a shelf and leafed through it. "Just listen to this! The surface tension of mercury is 470 ergs. That's terrific!" "You can increase the tension by passing an electric current through the mercury. Don't you remember reading about that old 'mercury heart' experiment?" "Why, that's right. Thanks for recalling it, Yura." Yura made a regal gesture. "Think nothing of it." "We'll set mercury aside for the time being," said Nikolai. "Now consider the following. Have you noticed the way water runs along telegraph wires in the rain?" "An intriguing sight, isn't it?" "The flow has a droplet-like cross-section," Nikolai went on. "Suppose we use an electric ray instead of a wire. The ray creates a field. The field increases the surface tension, and the cross-section builds up." "Better not tangle with fields, old man. You and I don't know much about them." "We won't really tangle with them. All we need is a high-frequency generator." "Let's have a look at those papers," said Yura after a pause. "What does this diagram represent?" Nikolai sat down on the sofa beside him. "Look here," he said. "We'll string up an inclined wire and send water down it to a vessel at the bottom. Since we know the time and the amount of water we'll be able to calculate the speed at which it moves. We'll measure the cross-section of the droplets and calculate their surface tension. Then we'll put a spiral round the wire-" "I get the point-a resonance circuit and superimposed frequencies." Yura sprang to his feet. "Give me some wire!" Nikolai's grey eyes wrinkled in a smile. Once Yura was hooked on an idea his energy knew no bounds. Yura pulled off his shirt, tossed his hair back off his forehead and produced a screwdriver from his pocket. It was his favourite screwdriver, for which he had made a hollow plastic handle, with a neon indicator lamp inside it, in his student days. He carried the screwdriver everywhere he went. Like Roland's sword, it had a name of its own. It was called Durandal. "We'll disembowel your radio set for a start," Yura said. "But don't worry, we'll only remove the input circuit. And the heterodyne." He turned the set Over on its side and went at it with his screwdriver. "We'll take out the giblets. Don't just stand there, Nick. Go out on the gallery and put the wire up." Working away busily, Yura went on. "A great man once said the true experimenter can set up any kind of experiment with three sticks, a piece of rubber, a glass tube, and some of his own saliva." CHAPTER FIVE IN WHICH THE READER GETS TO KNOW ANATOLE BENEDICTOV BETTER Anatole Benedictov switched on the motor. The belt drive made a rustling sound and the glass disc of the electrostatic machine began to revolve. Blue sparks crackled. A round aquarium on the table had wire wound around it, with thick copper tubing on top of the wire. A copper disc hung above the aquarium parallel with the surface of the water. Small fish darted about in the greenish water. Benedictov turned the levers of the valve oscillator. Then, slowly tightening a screw, he brought the copper disc close to the water. The fish stopped darting about. They seemed to fall asleep instantly. Benedictov looked at his watch, dropped heavily into an armchair and closed his eyes. The room was shrouded in semi-darkness. Rita sat on the sofa. A black cat lay at her feet. "You ought to give up these experiments, Anatole," she said thoughtfully. "You're biting off more than you can chew." "It's too late, Rita. I can't give up now." There was a silence. The electricity crackled. The fish in the aquarium slept. "Why do you keep experimenting with living creatures, Anatole?" Rita asked, leaning forward. "Your old-time predecessors used inorganic matter." "You know why. Living matter gives me something a piece of wood or a chunk of metal never could. It gives me action potentials." "But the knife is lost. How can you continue experimenting without it?" "I don't know. I need that knife all the time." Benedictov paused, then added, "Did you actually see it fall overboard? Could someone in the crowd have grabbed it?" "No, it went overboard. I dived after it at once, but the knife sank to the bottom." "What a thing to have happened!" Benedictov rubbed his shaggy head furiously. The doorbell rang. When Rita opened the door she found a husky man in blue overalls and a cap pulled down over his eyes standing there. "I'm from the municipal electricity board," he said. "I've come to inspect the wiring." "Step in," said Rita. "The meter's over there." The electrician removed the fuses and inspected them. "These have to be replaced," he said. "They're defective." "Rita!" Benedictov called from his room. "Why did you switch off the electricity?" "Hurry up and put those fuses back," Rita told the electrician. "Are you in a hurry to be fined?" said the electrician, but he put back the fuses. "Where's the èkitchen?" He went through the rooms, his head tipped back, looking at the wiring. Suddenly he stopped short. "Is that a motor running?" he asked. "Got a license for it?" "Rita!" Benedictov called impatiently. "Excuse me a moment," Rita said to the electrician as she turned towards Benedictov's study. The electrician heard her explaining what the matter was. A man's voice said, "To hell with him! Let him look. Here, hold this fish." "Ouch!" Rita exclaimed. The electrician glanced into the room in time to see the woman drop the fish and a big black cat spring to seize it. "Shoo!" cried Benedictov. The electrician jumped back from the doorway as the cat, covered with blue sparks and screeching piteously, dashed into the passage. Its fur stood on end, the sparks crackling. The cat ran frenziedly between the electrician's legs, received a kick, and bounded down the passage. "The cat thought I tossed the fish to her," Rita said with a laugh as she came out of the study. "Have you finished looking things over?" Benedictov followed his wife into the passage. "Who are you?" he asked the electrician in alarm. "What do you want?" "I ought to fine you for such goings-on," the electrician growled hoarsely, tugging his cap down over his forehead. He strode to the door, pulled it open and went out, slamming the door behind him. After the war Bugrov returned home to his flat in Cooper Lane where a circus poster, now yellowed, still hung on the wall beside his bed. Soon afterwards he married a stately, imperious woman named Claudia. She hid the poster in the lower drawer of the bureau, placed little rugs and embroidered cushions here, there and everywhere. Bugrov did not return to the circus. He obtained a medical certificate stating that he was a disabled veteran and began to make spring dynamometers at home for a small producers' co-operative of disabled war veterans. When Bugrov saw Benedictov's strange knife on board the Uzbekistan on his way home from a holiday on the Volga he immediately realized that such a knife could be a gold mine in a circus act. He carefully noted the place where the woman in red had dived overboard. When the passengers from the Uzbekistan went ashore he took a taxi and followed Benedictov to his home. Bugrov hesitated for several days before finally deciding on direct action to learn whether the man still had the knife or whether it had sunk to the bottom of the Caspian. "It was a waste of time," Bugrov thought gloomily as he walked to the trolleybus stop. "I didn't learn anything about the knife. All I did was tangle with a cat." Recalling the black cat covered with sparks he spat on the ground in fury. Vova Bugrov did not know that cats possess excellent electrical properties, although they could hardly be a source of electric power. It has been estimated that if 1,500 million cats were stroked simultaneously they would generate a mere 15 watts. "But maybe it wasn't a complete loss, after all," Bugrov reflected in the trolleybus. "The cat's owner was out of sorts. He swore and shouted at his wife. He might have been upset because the knife sank into the sea. Why didn't I grab it? I should have kept my eye on the handle. Well, I'll have to search the sea bottom." Bugrov fell into a daydream about a wonderful circus act. The day he arrived in a small town posters would be pasted on all the fences showing Bugrov in a red robe-no, a green robe would perhaps be better-and a turban, with a knife piercing his throat. "Famous Fakir so-and-so" the poster would read. He'd have to think up a good name for himself. The hall would be jammed to the rafters as he, Vova, emerged on the stage in a green robe, or maybe a black robe. He'd have to borrow his neighbour's scuba gear and do some diving. There was no silt in that place. Just sand. He was sure he would find the knife. Bugrov pushed his cap to the back of his head and winked at his reflection in the trolleybus window. CHAPTER SIX IN WHICH NIKOLAI OPRATIN TAKES THE BULL BY THE HORNS Nikolai Opratin saw Benedictov as soon as he opened the door into the laboratory. Corpulent and dishevelled, the biophysicist stood beside a table around which ran a thick copper coil. He was unfastening the harness in which a brown and white dog hung. When he set the dog on the floor it shook itself and began to sniff angrily at the experimenter's feet. "Good morning," Opratin said. "What do you want?" Benedictov asked coldly. "Your advice about fish." Benedictov turned away. "Ask someone else." "I'm sorry about that argument we had on board the ship," Opratin said softly. "I'm ready to take back my words." The biophysicist was silent. Then he nodded in the direction of the glass partition at the end of the laboratory. "Come this way," he said jerkily. They sat down opposite each other at a table covered with papers and blocks of paraffin cut into cubes. "The problem we're working on is the level of the Caspian, that is, how to raise it," Opratin explained. "We plan a series of experiments in the course of which ionized water will appear in the sea. My question is: how will this affect the fish?" Benedictov gave a cough but said nothing. "Our Institute will of course get in touch officially with yours," Opratin went on, his gaze fixed on Benedictov's face. "But I'd like to know, ahead of time-" "What are your ionization figures?" Benedictov asked, moving closer a spirit lamp on which stood a nickel-plated tray. The conversation faltered. Benedictov answered questions in unwilling monosyllables. He coughed and squirmed in his chair. His bloodshot eyes were evasive. Suddenly he rose, murmured an excuse, and left the room. Opratin let his eyes roam over the table. He noticed an empty glass ampoule. As he read the Latin inscription on it his thin lips twisted in an ironic smile. Benedictov returned looking a completely different man, fresh-faced, cheerful, with sparkling eyes. "Please continue," he said on his way to his desk. "Look here," said Opratin softly. "Did you try to magnetize that knife?" Benedictov stopped short. Opratin's pale blue eyes stared steadily at him without blinking. Benedictov felt acutely uncomfortable. "What's it to you?" he muttered. The ensuing silence lasted several seconds. Benedictov was the first to lower his eyes. "Sit down," Opratin said. "I'm not asking out of idle curiosity. I've been thinking a lot about your knife and it seems to me I've guessed a few things. Can it be magnetized?" "Suppose it can? So what?" "This is extremely important. Don't look at me as if you wanted to tear me to pieces. I've come here to help you." "I don't need any help." Opratin let this remark pass. "Did you measure the knife's electric resistance?" he asked. "Did you test it for use as the core of an electromagnet?" Benedictov had not done that either. "Did you try it on a voltaic arc?" Benedictov shook his head thoughtfully. "How does the knife react to chemical substances?" He flung question after question at Benedictov. Benedictov gave reluctant replies. He had not performed half of the tests about which this uninvited inspector was asking him. "Well, well," said Opratin. He smoothed his thinning hair. "To all appearances, my dear man, you have followed the wrong path." "What path I follow is my own business," Benedictov growled. "Yes, to be sure." Opratin drummed his fingers on the table. "You're a biologist and I'm a physicist. Don't you think that if we combined forces we'd reach the goal faster?" Benedictov said nothing. "I won't lay claim to any of your laurels. I just want to help you. All I'm interested in are the scientific results." Opratin looked searchingly at Benedictov. "What do you say?" The biophysicist glanced out of the window. "Damn it!" he said flatly. CHAPTER SEVEN IN WHICH A REGATTA BRINGS THREE OF THE CHARACTERS STRAIGHT TO THE PLACE WHERE THE AUTHORS WANTED THEM TO BE Early Sunday morning Nikolai Potapkin ran down the steps and out into the courtyard, swinging his little suitcase. The sleeves of his white shirt were rolled up above the elbows, his open collar exposed a tanned chest. Glancing up at the cloudless sky, he shook his head. Not a breath of wind! Yet this was the day of the big regatta. He arrived at the marina to find preparations in progress only on the centreboard and Star class boats, for which even a slight breeze would be enough. The crews of the L-4 boats, discouraged by the absence of wind, were gathered in their cabins in front of TV sets watching a children's programme. Nikolai found Yura sitting on the edge of the pier in his bathing trunks, his long arms wrapped round his knees, singing a song from an Indian film in a mournful voice. He sat down beside Yura and took up the refrain. They sang until dockmaster Mehti stuck his head out of the window of the boathouse and begged them to stop. "This isn't an opera-house," he complained. "You shouldn't have lent uncle Vova your scuba gear," Yura remarked after a while. "We could have done some diving." "Why not come over to my place if the races are cancelled? We might try to change the pitch of the spiral." "I don't want to." "Why not?" Nikolai looked at his friend. "Ah, yes, of course. A date with Val." "No, I-" "Then what the devil-" "Nothing will come of it, Nick. The surfaces of substances are a hazy subject. If famous scientists don't know how to handle them, then what's the use of us trying?" "You needn't if you don't want to. I'll get along without you." "You can't. At least I know my way about electronics, which is more than you can say." "Anyway, I won't give up. There must be a field in which surface tension increases." "A field!" Yura repeated derisively. "'Oh, field, broad field, who strewed you with whitened bones?'" Boris Privalov came up to the young men. "Good morning, boys. Doesn't look as though there'll be any racing today, does it?" "The races haven't been officially called off yet," said Yura. "We're waiting. Take a seat." The three of them sat side by side on the pier, dangling their feet in the water, the sun warming their backs, waiting for the wind to come up. "Do you recall our talk about surface tension, Boris?" Nikolai asked in a determined voice. The sun flashed on Privalov's glasses as he turned to look at Nikolai. "Yes, I do." "Well, it's like this." Nikolai launched into a description of the experiment with water and a wire, and mentioned the spiral and the desired field. Privalov listened closely, frowning and screwing up his eyes. "It's amateurish," he said finally. "You can't go in for that sort of thing without thorough preparation. There's a book by Adam on the physics and chemistry of surfaces. I'll lend it to you." He was silent for a while. "Besides, at the moment we have more than enough work on our hands, and later there will be a pipeline across the whole of the Caspian." "I've been hearing about a transcaspian pipeline for years," said Yura. "We're beginning to wonder whether it will ever be built." "It will. I forgot to ask you yesterday, Nikolai, if you went over to Opratin's." "Yes, I did." "See anything interesting?" "Not particularly. I think they're setting up a big electrostatic installation." "Electrostatic, you say?" Privalov looked thoughtful. Yura sprang to his feet. "A wind! A wind's coming up!" A light southerly sea breeze ruffled the surface of the bay and rustled in the trees along Seaside Boulevard. The flag of the Chief Judge fluttered tautly. A ship's bell tinkled. The class M flag was run up. "The centreboard boats are getting ready," Yura said excitedly. "If it blows a little stronger the keel boats can follow suit. Let's go." After the centreboards the Star class boats started off. There was enough wind for these small, light boats which carried a great deal of sail. The wind freshened, and half an hour later boats of the L-4 class were announced. Soon the steady ringing of a ship's bell informed the competitors that five minutes were left before the start. Ah, those last five minutes! What a tricky business it was getting as close to the starting line as possible within those five minutes, but not crossing it ahead of time! Four rings of the bell meant four minutes were left, then three, two, and one. Finally, a quick ringing of the bell gave the signal for the start. Beating against the wind, the boats entered the first lap of the fifteen-mile course. Wind filled the sails as the sheet, held in strong hands, quivered; the sea whispered to the boats sliding through it; the sun bathed everything in gold against the blue of the sea. The Mekong was among the first to round the mark. Following an advantageous course, it approached its closest rival on a parallel course windward, but the other boat did not let the Mekong overtake it. In the excitement both crews forgot about the other competitors. When the Mekong finally forged ahead, the crews discovered that almost all the other boats had overtaken both of them, were rounding the second buoy and were raising their spinnakers, the big triangular sails used when running before the wind. Yura, who was sitting on the deck, raised himself on one knee. "Obstacle ahead!" he shouted. "Two boats lying at anchor!" When the Mekong came closer they saw a man in a straw hat sitting in one of the boats. They could hear the motor running, but the boat was not moving. The second boat, some distance away, was empty. "Ahoy there!" Yura shouted, leaning over the side. "Watch out!" Just then the wind died down, prompting the thought that Nature is sometimes actively hostile to man. Why else should the wind die down at noon on a Sunday just when a regatta is at its height? The sails flapped several times and then hung limp. The Mekong continued to move forward a short distance by inertia before coming to a full stop about half a cable length from the motor-boat. "Well, all we can do now is sunbathe. What a race!" said Yura in disgust. Whistling softly, he scratched the boom with his fingernails, then threw a ten-kopek coin overboard. But these century-old remedies failed to call up a wind. "I've done everything I can," Yura announced. Then he stretched out on the deck and began to sing in a doleful voice: The river flows but it doesn't flow; The day got off to a bad start. How can I tell you what's in my heart? But I think you probably know. Nikolai glanced at the distant shore and the refrigeration plant outlined against the blue sky. "Why," he said wonderingly, "I believe this is the spot where we rescued that young woman in the red dress." All of a sudden silence descended as the motor of the boat ahead was switched off. They heard an angry voice say: "I came here first. Everything I find here is mine." "Don't be silly," another voice said. "The sea doesn't belong to you. It belongs to everyone." "I'll show you who it belongs to!" The motorboat rocked as the man in the straw hat waved his arms. "I wonder who he's talking to?" Nikolai looked more closely at the motorboat. Then he fetched his binoculars from the cabin and trained them on the straw hat. "Just what I thought. The voice sounded familiar. That's Opratin." "Give him my regards," Privalov said. "Damn it!" Nikolai exclaimed. "You spoke of wanting the scuba gear, Yura. Well, there it is." Taking the binoculars, Yura clearly saw Bugrov's big head in the water beside the motorboat. The mask was pushed up on Vova's forehead and he was clinging to the boat with one hand. Yura lowered the binoculars. "You're right. The diving gear is in danger. It looks as though they want to drown each other." "I'd like to know what they're doing here," said Nikolai. "Do you mind, Boris, if I take a short swim?" "Don't be too long. The wind may come up any minute." "I'll be back soon." With these words Nikolai plunged into the sea and swam towards the motorboat. "Come, Yura," said Privalov, lighting a cigarette and letting the smoke out through his nostrils, "tell me about your experiments once again." That morning Nikolai Opratin had spent more than an hour on the small wharf belonging to the Institute of Marine Physics. He had attached a cable drum to the side of an Institute motor-boat and had wound on it a thin cable with a strong electromagnet at its end. Anatole Benedictov had said the knife could be magnetized. If this was so, then he, Opratin, would find it. How stupid that the knife should have fallen overboard! And what a scene Benedictov had made on deck! Opratin recalled the glass ampoule on the biophysicist's desk. A drug addict. Yet without that scene on deck he, Opratin, would not have learned of the existence of the mysterious knife. A drop of common sense in a barrel of nonsense. Opratin finished equipping the boat, started up the motor, and chugged out of the bay. The sea heaved lazily beneath the hot August sun. The red cone of the fairway buoy with a big white "18" painted on it rocked on the surface. The TV mast was at Opratin's stern and the refrigeration plant on the left. He turned the boat a few degrees to starboard. Now this must be the place. This was where Benedictov's wife had fallen overboard after the knife had dropped into the sea. An interesting woman, no doubt about that. Had she fallen or had she jumped? An empty boat bobbed in the water about twenty metres away. Where was the owner? Had he drowned? Or had the boat torn free of its moorings and drifted out of the bay? Opratin was not in the least interested. He pushed a lever which switched the motor's drive from the propeller to a generator to which the cable with the electromagnet was attached. The cable wound off the drum into the water. Opratin wondered how soon his particular fish would bite. At the end of the cable was an electromagnetic underwater probe connected with an ultrasonic range-finder. The zigzagging green line on the oscillograph screen would show the shape of metallic objects on the sea floor. If Opratin wanted some object he could switch on the electromagnet and pick it up. Using the oars, Opratin slowly moved the boat back and forth, combing the place. Suddenly the cable jerked. Bubbles rose to the surface, then a huge hand was thrust out of the water, followed by a head, the face covered by a mask. The mask was connected by a hose to a cylinder on the man's back. The diver closed the valve of the aqualung and pushed the mask up onto his forehead, revealing a broad face with a heavy jaw. Opratin recognized him at once. He was the man who had tried to take the knife from Benedictov aboard the Uzbekistan. It was obvious why he was at this particular spot in the sea. An unpleasant situation. While the diver coughed and spat out water Opratin decided to take the offensive. "Hey you, there!" he shouted. "Why the devil did you pull my cable?" "You'll soon find out!" came the answer in a threatening tone. The man swam over to Opratin's motorboat, reached up to grip its side, and let loose a stream of obscenities that set Opratin's teeth on edge. The substance of Bugrov's monologue was that law-abiding citizens could not go in for skin-diving on their day off because "others"-a word which Bugrov proceeded to define-played all kinds of dirty tricks on them. Bugrov had been combing the area in circles. He would anchor his boat, dive down and swim around in a circle, studying the firmly-packed sandy bottom. His supply of air was almost half used up when he saw a black cylinder suspended from a cable slowly moving over the bottom. He swam up to the cylinder and tugged at it, gripping the place where it was attached to the cable. An electric shock galvanized him, and he tore his hand away with difficulty. Dazed and angered, he headed for the surface. Bugrov had been having bad luck with electricity lately. "Get going, quick-before I turn your tub upside down!" he roared. Opratin did not want any trouble, the more so that a sailboat was approaching. He moved over to the stern and said in a placative tone, "Listen, how was I to know you were swimming here?" "Couldn't you see my boat? Stop acting innocent, you scum!" They wrangled for another few minutes, until Opratin realized he was being foolish and would have to get rid of the man some other way. He switched off the motor, gave the becalmed sailboat a fleeting glance, and said, "I know what you're looking for, but you'll never find it with an aqualung." Bugrov blinked in disbelief. "D'you take me for a fool?" he asked hoarsely. "Get out! I came here first. Everything I find here is mine." "Don't be silly! The sea doesn't belong to you. It belongs to everyone." "I'll show you who it belongs to!" Bugrov began to rock the motorboat. Opratin had to throw out his arms to keep his balance. "All right, I'm leaving," Opratin said, strongly tempted to hit the man over the head with his anchor. "But you'll never see that knife. You can take my word for it as a scientist." This made an impression on Bugrov, who had a deep faith in the omnipotence of science. "Are you looking for the knife too?" he asked in what was almost a civil tone. "There, that's the way to talk," said Opratin. "Yes, I am. If I don't find it I'll make one just like it." Bugrov gave the face under the straw hat a thoughtful glance. "I'm apt to be quick-tempered," he said. "Maybe I said some things I shouldn't have." Opratin gave a wry grin. Nikolai quickly covered the hundred metres or so to the motorboat in a noiseless breast stroke. As he approached it he heard Bugrov say, "All I want is the knife. I'm willing to make sacrifices for science." "I'm glad to hear it," said Opratin. "I am what I am," Bugrov said modestly. "Will I be going to the island often?" "No, not very." "There's a fishery nearby. I can get caviar cheap there." He fell silent, his head filled with visions of future profits. At that moment Opratin caught sight of Nikolai beside the boat. He removed his dark glasses to take a better look. "Is that you?" he asked with a pleasant smile. "What an unexpected encounter!" "Hi, there," called Bugrov, recognizing his neighbour. "Where" d you drop from?" "That sailboat," Nikolai caught hold of the motorboat's life line. "We're becalmed, so I decided to take a swim." An awkward silence followed. "I'll be on my way," said Bugrov, pushing off from the motorboat. "Do you want your scuba gear now?" "No," said Nikolai. "Bring it to me at home." Bugrov swam back to his rowboat. "I see you know him," remarked Opratin. "Yes, we live in the same house." Nikolai stared at the generator, the face plate of the cathode-ray tube of the oscillograph and the drum with the cable running into the sea. Opratin smiled. "How I envy you. Sailing is a wonderful sport. But I, as you can see, have to carry out investigations on Sundays too." "Yes, I see," said Nikolai, trying feverishly to make out what sort of cable it was. "Well, good luck." He pushed off from the motorboat and swam back to the sailboat. If only he had known the circumstances under which he would cling to the life line of that motorboat a second time! CHAPTER EIGHT IN WHICH PRIVALOV ACQUIRES A NEW ALLY The wheel now worked well. Unwinding the "spool", a tug had laid the first pipeline to Neftianiye Reefs. The pressure trials completed, they returned home towards evening. At this time of day there was not much traffic on the road, which ran between vineyards, with oil derricks beyond them, and their sleek grey car made good time. Privalov relaxed in the back seat, satisfied after two days of intensive work. Pavel Koltukhov, who sat beside him, dozed and smoked simultaneously; he woke every now and then to take a puff or two on his cigarette and then closed his eyes again. Nikolai was at the wheel. Beside him Yura was going through his notes on the pressure trials. "That's a load off my mind," Privalov said with a sigh. "I hope the builders will be able to handle the parallel pipelines without us." "You can gird your loins for another job," said Koltukhov. "You mean the transcaspian pipeline? But the project hasn't been approved yet." "Approval was wired yesterday. Is your survey programme ready?" "It's been ready a long time." "That's fine. We'll discuss it tomorrow." Nikolai slowed down as they passed through a small town and then put on speed when they came out into open country again. "How are things going, boys?" Privalov asked in a low voice. "Have you read that book by Adam?" "It isn't what you'd call light reading," Nikolai replied. "We're stuck, Boris. We're thinking of experimenting with mercury." The remainder of the drive into town passed in silence. After the young men got out on the corner of Toilers of the Sea Street, Privalov took the wheel and drove to the Institute. "Look here, Boris," said Koltukhov. "Do you think it's fair to let your imagination run wild and make those two young men pay for it by wasting their time and energy?" "I'm not making them do anything. They started experimenting without sufficient theoretical grounding. I told them what to read and gave them some advice. That's all." "Then why does Nikolai spend every free minute of his time in the automation department, showering everyone there with questions?" Privalov shrugged his shoulders. "Aren't you letting your own imagination run wild? Dabbling in resins like an alchemist, in between conferences?" "I'm doing something useful. I'm improving pipeline insulation materials." "But you've done that already. Now you're making some smelly new compounds. People have to hold their noses when they go past your den under the stairway." Koltukhov merely grinned. "All right," he said, lighting another cigarette. "I'll let you in on my secret. My idea is a much better one than yours. How do we protect our pipes and steel structures from corrosion by sea water? By covering them with insulation. Besides being expensive, this method isn't always dependable. When cracks form in the insulation, corrosion goes ahead faster than ever, as you yourself know. Another way of controlling corrosion is by using electricity, but this is expensive too, and it involves a lot of work. You have to string transmission lines and bring a positive charge to the pipeline. My idea is a plastic coating that would serve as insulation and have an electrostatic charge at the same time." "Not a bad idea," said Privalov. "But mine is better. It does away with both pipes and insulation." Koltukhov dismissed it with a wave of his hand. "You talk like a college boy, Boris." The car drove into the Institute yard. "Is old man Bagbanly in town?" Privalov asked. "I think so. Why?" "I'd like to get in touch with him." "Yes, do go and have a talk with him. He'll throw cold water on your idea, if anyone does." They sat on the balcony drinking tea. Professor Bakhtiar Bagbanly thoughtfully stirred his glass as he gazed out on the broad crescent of city lights skirting the bay. A Corresponding Member of the Academy of Sciences, he was a clever, erudite man with the skilful hands of a gifted experimenter. He had been Privalov's favourite lecturer when Privalov was an undergraduate twenty years before. Many of Professor Bagbanly's former students dropped in to discuss their work with him. He was generous with his knowledge and advice, and he addressed all the young people by their first names. They addressed him in the Eastern fashion as "Bakhtiar Muellim", meaning "Teacher Bakhtiar". The old man had a large grey head, black eyebrows and a drooping silvery moustache beneath a hooked nose. Professor Bakhtiar Bagbanly fixed his twinkling brown eyes on Privalov and said, "I didn't understand a thing. Your words are as vague as the dreams of a camel. Now tell me straight out. What is it that you want?" Privalov knew that the old man's brusque manner was not to be taken seriously, and so he let the "camel" bit pass unheeded. "I'll begin from the beginning", he said, taking a sip of tea. "We're starting to design a pipeline across the bed of the Caspian." The old man nodded. "A pipeline, as you know, is not an end in itself," Privalov continued. "It is only a means towards an end, which is a regular supply of oil." "What's wrong with using a pipeline to attain this end?" "As far as that goes, nothing. But what is the purpose of the pipes? To separate the oil from the environment." "That's well put." "Please don't make fun of me, Bakhtiar Muellim. When it comes to the technique of transporting oil across a sea, or transporting one liquid through another in general, our thinking is conservative. How do our pipelines differ from those used in ancient times? Well, the pipes are more durable and the pumps more powerful. But the principle of the thing remains the same. Pipeline delivery is better than using oil tankers, of course. It's cheaper and it does not pollute the sea. But, you realize-" "I realize that you don't like pipes. How do you propose to replace them?" "This is what came to my mind." Privalov finished his tea and moved his glass aside. "I recalled Plato's experiment. If we take oil with the same specific weight as that of water and pour it into the water, surface tension will cause the oil to assume the minimum shape and form a sphere. Isn't that so? But suppose we build up surface tension in such a way that it acts along two axes instead of three? Then one cross-section of the oil will be a circle and the other- In a word, the oil will take the shape of a cylinder. The surface of the oil will become a pipe, as it were." Professor Bagbanly grinned and shook his head. "Ingenious! A pipe without a pipe. But please proceed." "Further," Privalov continued enthusiastically, "we must have a field. Imagine an underwater power beam pulsed along a route. A definite frequency would generate a field in which the oil stretches along the beam. Do you realize what that would mean? A stream of oil running through the water from the west coast of the Caspian to the east coast." "You've described the design of the steam locomotive to me," the professor said. "Now tell me how it can travel without being pulled by horses. What would make the stream of oil move?" "Perhaps the energy of the beam itself. A conductor moves in a magnetic field if it crosses lines of force, doesn't it? I don't know yet, Bakhtiar Muellim. I'm just advancing a bare hypothesis." "Bare and defenceless," the old man added. There was a long silence. Then Professor Bagbanly rose and began to pace the balcony. "You speak of surface tension," he said finally, "and you hope old Bakhtiar will gladden your ears with a harmonious concept. You nurse an idle hope, my son. The surfaces of matter constitute one of the fundamental riddles of modern physics. The surface tension of liquids is a zone where the specific properties of surfaces manifest themselves. Surface tension produces forces that are always directed inwards. The tea in that glass is in a state of tension. Its surface presses inwards from the top and bottom and sides with a force of more than ten tons per square centimetre. Hence, liquids are well-nigh incompressible. Until recently it was thought that liquids could not be compressed at all. Or take solids. When we cut a piece of clay with a knife we disunite whole worlds and form new surfaces. In the process, energy is released." "Just what lies under a surface?" Privalov asked. "I don't know, my son. Nobody knows yet. How can you get under it? If you scrape off a surface, another surface of the substance immediately forms. It is the interface on which the interatomic forces that hold the elements of a substance together interact with the ambient medium and achieve a balance in some specific fashion. How? That is something we don't yet know. But if we get to know it, then sooner or later we'll penetrate to the heart of the matter. And once we have fathomed the secrets of surfaces we will proceed to utilize the colossal force latent in them." "Do you mean to say that my idea is too far ahead of the times?" Privalov asked sadly. "It well may be. Take an example which Shuleikin cites in his Marine Physics. When an express train brakes suddenly the enormous kinetic energy it releases is absorbed by the extremely thin surface layer of contact between the wheels and brake-shoes, yet this does not seem unbelievable. "Suppose," Bagbanly continued as he walked back and forth, "we succeed in increasing the surface tension and-" "You agree, Bakhtiar Muellim!" Privalov almost shouted. "Don't be in such a hurry. I assume that it is possible-theoretically, but not in reality." "Why?" "Because your oil 'sausage'-if you succeed in making one-will encounter tremendous resistance as it moves through the water. Friction, my friend. Friction is also a property of surfaces. The surface layers will tear away from the inner layers, and the jet will disintegrate." "Excellent," said Privalov. "That means we have another job-that of reducing the friction." Bagbanly dropped into an armchair and burst out laughing. "You're wonderful, Boris," he said, wiping his eyes with his handkerchief. "Both friction and surface tension are child's play to you. You're even prepared to turn matter inside out." "Well, I'll be going, Bakhtiar Muellim, " Privalov said with a sigh. "Thanks for your advice." The old man stared at him intently. "You know what? Take me in as a member of the team on this project. I'll work on it out of curiosity. Who knows what may come of it? But only on condition we don't go to extremes. We'll concentrate on the underlying principles and nothing more." CHAPTER NINE IN WHICH AN EXPERIMENT NOT ENTIRELY SUITABLE FOR THE HOME IS DESCRIBED "Are you sure the knife fell overboard, Rita?" Anatole Benedictov said. "Yes, I'm sure." "Quite sure?" "Well, really!" Rita laid aside her book and rose from the sofa. "Don't be angry, darling. You see, a couple of men have hunted for the knife on the sea bottom at that place and they failed to find it." "It would be easier to find a needle in a haystack." "You've changed lately. Your attitude to my work is different. That's why I asked." "You're the one who's changed, Anatole. You're simply stopped noticing me. Do give up those experiments. Please give them up. They'll drive you crazy. They've already come between us. Think of how wonderfully we were getting along before that ill-fated discovery." "That's true," said Benedictov. "We were, weren't we?" Rita asked hopefully. Benedictov glanced at his watch. "A person is coming to see me in a few minutes. We'll be doing some work together." Rita shook her head and silently left the study. Anatole Benedictov had fallen in love with Rita several years earlier, when he was teaching at the University and she was a gay, vivacious biology student there. Shortly before that he had presented a brilliant thesis for an advanced degree dealing with electric currents in living organisms, and had published a study of electric fish which had aroused much discussion among biologists. During one of his lectures he had noticed several girls giggling and whispering as they passed a sheet of paper through the auditorium. He strode rapidly over to them and snatched up the paper. He looked down at it and frowned. What he saw was a sketch of himself, shaggy-haired, thickset, with a fish's tail, conducting with a trident as fish danced round him. Beneath the sketch were the words, written in a fine handwriting: Neither fish nor fowl, neither physicist nor biologist, He's an intermediate class electro-ichthyologist. "Whose work is this?" he asked, letting his angry eyes roam over the auditorium. A slender blonde girl rose. "It's mine," she said politely, her brown eyes gazing boldly into Benedictov's. It was an announcement rather than a statement. "Thank you," Benedictov said slowly, in a slightly nasal voice, thrusting the drawing into his pocket and continuing his lecture. After they were married, Benedictov admitted to Rita that when she said "It's mine" he had suddenly felt a wave of heat engulf him. As for Rita Matveyev, she had long been in love with the brilliant lecturer. Rita graduated from the University the year they were married and started teaching biology in a secondary school. That same year Benedictov was given a laboratory at a research institute. Here he enthusiastically continued his investigations in the sphere of action potentials. The young couple led a fast-paced life, keeping open house for their many friends. Half a year before their cruise on the Uzbekistan the Benedictovs had moved into a new flat. On moving day there occurred a strange event which triggered a series of disasters. Rita and her husband had decided to leave a lot of their old things behind when they moved. Anatole naturally protested when he found her putting an old flower vase and a rusty bar of iron into a packing crate. "We agreed not to take such things, Rita," he said. "You ought to throw that trash away." Rita discarded the vase but insisted that she could not part with the bar of iron, which had been in the possession of her family for years and years. "A Matveyev relic?" Benedictov asked with a laugh, picking up the bar. He turned it over in his hands and shook it. The blade of a knife slid out of the side of the bar. Benedictov stared dumbfounded at the narrow blade. It was covered with a thin, transparent layer of grease through which a wavy pattern showed. He cautiously touched the blade. His fingers went through it-just as they would have passed through empty space. He pressed his hand to his eyes. "What's the matter?" Rita asked in alarm. She came up to him and glanced at the bar. Her eyes widened. No, she didn't know anything about the bar except, that according to an old family legend a distant ancestor had brought it back from India. Her father had treasured the bar all his life, and now she was doing the same. No one had ever imagined there might be something inside it. Benedictov held the bar as if it were a rattlesnake. He slowly closed his fist over the blade. His fingers came together over emptiness. Rita gave a start. "Wait a minute," she said. "There was another bar just like this one, all covered with rust. We used it to prop up the old wardrobe that had a broken leg." She ran into the next room, returning a moment later to say, "It's gone. We must have thrown it out yesterday when we carted all that old rubbish away." The first few moments of astonishment gave way to curiosity. Benedictov carefully examined the bar. Two lines of letters were engraved on one side. Between the two lines there was something that looked like a crown. Or it might have simply been a spot of rust. Benedictov noticed a fine line running round the outside of the bar. The whole thing was obviously not a solid bar of iron but a box with a cover. After a long struggle Benedictov finally pried off the top. Inside the box lay a knife handle, with a piece of cloth wound round it. The cloth must have become loosened with time and when the box was shaken the blade dropped out. There was nothing extraordinary about the beautiful handle of yellowed ivory. It could be grasped. He concluded that the section of the blade that went into the handle must be made of ordinary metal too, otherwise it would not remain attached to the handle. But the blade itself! It passed freely through everything without leaving the slightest trace, as though it were made of thin air. The first glimpse of the mysterious knife marked a turning point in the life of the Benedictovs. Anatole determined to get to the root of the mystery. "Penetrability. The ability to pass through matter. That's the goal, Rita. You say this knife has been in your family at least two hundred years? Well, if they could make a knife that passes through matter you and I can certainly do the same." Anatole painted glowing pictures of Altered Matter which man could easily control. Rita became enthusiastic too. She helped Anatole to set up experiments and kept a record of their results. Weeks and then months passed. Benedictov turned his study into a small laboratory where, more and more frequently, he worked through the night. He grew impatient and irritable. Rita noticed that his behaviour had become strange. At times he would be depressed and sullen, and then he would suddenly become his cheerful, energetic self again, capable of working for days on end without resting. He fell into apathy just as suddenly. Rita grew worried. She now realized that Anatole had taken on a job that was too much for one man. But when she tentatively suggested that he ought to let the Academy of Sciences know about his discovery he declared that he could not do this until he himself got to the bottom of it. With great difficulty she persuaded him to take her on a holiday cruise on the Volga. We already know how disastrously their holiday ended. When the doorbell rang, Anatole jumped up but Rita got to the door first. She opened it to Nikolai Opratin, who looked his usual dapper self in an elegant grey suit. Bending his neatly combed head, he touched his cold lips to Rita's hand and inquired after her health. "I am in perfect health," Rita said, enunciating the words distinctly. "Goodbye." "Hold on, there. Where are you going?" Anatole asked. "To the pictures." The door slammed shut and the two men were left alone in the flat. "All the better without her." Anatole growled, leading the way into his study. Nikolai Opratin cast a critical glance over the equipment. Then he removed his jacket, carefully pulled up his trousers at the knees, and sank into an armchair. Benedictov sat down opposite him. "First, Anatole, I want you to tell me in detail about the knife," Opratin began. He listened closely to Benedictov's account. "Indian magic. If I hadn't seen it myself I wouldn't believe it. Penetrability ends near the handle, you say?" "Yes, there's a sort of intermediate zone of about six millimetres. The part that goes into the handle is ordinary steel." "Did you weigh the blade?" "Yes. The weight corresponds to the size." "That's extremely interesting. It means the knife behaves like ordinary matter in the gravitational field." "It seems to me," said Benedictov, "that the bonds between atoms, or perhaps within atoms, have been changed in some way in this knife. I am convinced that the properties of living organisms, whose vital functions are connected with the discharge of energy in the form of action potentials, will provide the key to the riddle." He went over to the round aquarium encircled by wire and launched into a discourse, but Opratin soon interrupted him. "I get the picture, Anatole," he said courteously but firmly. "You put the fish between the plates of a capacitor in an oscillatory circuit and look for a resonance in the bioelectrical frequency of the fish. I don't think this avenue will lead you anywhere. You're right, though, about one thing -that the inter-atomic bonds in the knife were altered. But how was the energy of the intrinsic bonds of this substance overcome? If we only had the knife now! By the way, you said it lay inside an iron box. You haven't lost the box too, have you?" Benedictov took a small iron bar from a drawer and held it out to Opratin. It looked something like a pencil case. Opratin sprang to his feet. "What the devil!" he exclaimed. "The same letters!" Engraved on the cover were the letters "A M D G". Below the letters a crown had been engraved, and below that were "J d M" in smaller letters. Opratin walked the length of the study and back again, his steps ringing like the pounding of a hammer. "What's the matter?" Benedictov asked, turning his head to follow Opratin. "What's upset you?" "Oh, nothing much. What do those letters stand for?" "The upper four are the initial letters of a Jesuit motto but I don't remember it. I don't know what the bottom ones stand for. It's unlikely they have anything to do with our problem." "Well, let's not lose time setting up our first experiment. When you described your generator I got an idea. Was a crate of instruments delivered to you today?" "Yes. By the way, were you the one who sent that ape to this place disguised as an electrician?" "How could you ever think that? He's my laboratory technician. Extremely useful, and not a bad fellow at all. But to get back to business. I think we should begin with a minimum surface, with the point of a needle." Opratin opened a case and took out a metal holder to which a long, highly polished needle was attached. Then he briefly set forth the method of the experiment. The equipment lay on a small table, u