Calhoun gagged in purely instinctive revulsion. The things in the plastic container were gray and small. Had they been still, they might have been no worse to look at than raw oysters in a cocktail. But they squirmed. They writhed.
"I will show you," said Dr. Lett amiably.
He turned to the glass plate which divided the room into halves. The man behind the thick glass now pressed eagerly against it. He looked at the container with a horrible, lustful desire. The thick-eyeglassed man clucked at him, as if at a caged animal one wishes to soothe. The man beyond the glass yawned hysterically. He seemed to whimper. He could not take his eyes from the container in the doctor's hands.
"So!" said Dr. Lett.
He pressed a button. A lock-door opened. He put the container inside it. The door closed. It could be sterilized before the door on the other side would open, but now it was arranged to sterilize itself to prevent contagion from coming out.
The man behind the glass uttered inaudible cries. He was filled with beastly, uncontrollable impatience. He cried out at the mechanism of the contagion-lock as a beast might bellow at the opening through which food was dropped into its cage.
That lock opened, inside the glass-walled room. The plastic container appeared. The man leaped upon it. He gobbled its contents, and Calhoun was nauseated. But as the para gobbled, he glared at the two who—with Murgatroyd—watched him. He hated them with a ferocity which made veins stand out upon his temples and fury empurple his skin.
Calhoun felt that he'd gone white. He turned his eyes away and said squeamishly:
"I have never seen such a thing before."
"It is new, eh?" Said Dr. Lett in a strange sort of pride. "It is new! I ... even I!... have discovered something that the Med Service does not know!"
"I wouldn't say the Service doesn't know about similar things," said Calhoun slowly. "There are ... sometimes ... on a very small scale ... dozens or perhaps hundreds of victims ... there are sometimes similar irrational appetites. But on a planetary scale ... no. There has never been a ... an epidemic of this size."
He still looked sick and stricken. But he asked:
"What's the result of this ... appetite? What does it do to a para? What change in ... say ... his health takes place in a man after he becomes a para?"
"There is no change," said Dr. Lett blandly. "They are not sick and they do not die because they are paras. The condition itself is no more abnormal than ... than diabetes! Diabetics require insulin. Paras ... something else. But there is prejudice against what paras need! It is as if some men would rather die than use insulin and those who did use it became outcasts! I do not say what causes this condition. I do not object if the Minister for Health believes that jungle creatures creep out and ... make paras out of men." He watched Calhoun's expression. "Does your Med Service information agree with me?"
"No-o-o," said Calhoun. "I'm afraid it inclines to the idea of a monstrous cause, but it really isn't much like diabetes."
"But it is!" insisted Lett. "Everything digestible, no matter how unappetizing to a modern man, has been a part of the regular diet of some tribe of human savages! Even prehistoric Romans ate dormice cooked in honey! Why should the fact that a needed substance happens to be found in a scavenger...."
"The Romans didn't crave dormice," said Calhoun. "They could eat them or leave them alone."
The man behind the thick glass glared at the two in the outer room. He hated them intolerably. He cried out at them. Blood vessels in his temples throbbed with his hatred. He cursed them.
"I point out one thing more," said Dr. Lett. "I would like to have the co-operation of the Interstellar Medical Service. I am a citizen of this planet and not without influence. But I would like to have my work approved by the Med Service. I submit that in some areas on ancient Earth, iodine was put into the public water-supply systems to prevent goiters and cretinism. Fluorine was put into drinking water to prevent caries. On Tralee the public water supply has traces of zinc and cobalt added. These are necessary trace elements. Why should you not concede that here there are trace elements or trace compounds needed——"
"You want me to report that," said Calhoun, flatly. "I couldn't do it without explaining—a number of things. Paras are madmen, but they organize. A symptom of privation is violent yawning. This ... condition appeared only six months ago. This planet has been colonized for three hundred years. It could not be a naturally needed trace compound."
Dr. Lett shrugged, eloquently and contemptuously.
"Then you will not report what all this planet will certify," he said curtly. "My vaccine——"
"You would not call it a vaccine if you thought it supplied a deficiency—a special need of the people of Tallien. Could you give me a small quantity of your ... vaccine?"
"No," said Dr. Lett blandly. "I am afraid you are not willing to be co-operative. The little of my vaccine that is available is needed for high officials, who must be protected from the para condition at all costs. I am prepared to make it on a large scale, though, for the whole population. I will see, then, that you have as much of it as you need."
Calhoun seemed to reflect.
"No," he admitted, "I'm not ready to co-operate with you, Dr. Lett. I have a very uncomfortable suspicion. I suspect that you carry a small quantity of your vaccine with you all the time. That you cannot bear the idea of being without it if you should need it. I say that because it is a symptom of other ... similar conditions. Of other ... abnormal appetites."
Dr. Lett had been bland and grinning in mockery. But the amusement left his face abruptly.
"Now ... what do you mean by that?" he demanded.
Calhoun nodded his head toward the para behind the glass wall.
"That poor devil nearly yawned his head off before you gave him his diet of scavengers, Dr. Lett. Do you ever yawn like that ... so you make sure you've always your vaccine with you to stop it? Aren't you a para, Dr. Lett? In fact, aren't you the ... monstrous cause of ... paras?"
Murgatroyd cried "Chee! Chee! Chee!" in great agitation, because Dr. Lett had snatched up a dissecting scalpel and crouched to leap upon Calhoun. But Calhoun said:
"Easy, Murgatroyd! He won't do anything regrettable!"
He had a blaster in his hand, bearing directly upon the greatest and most skillful physician on Tallien Three. And Dr. Lett did not do anything regrettable. But his eyes burned with the fury of a madman.
Five minutes later, or possibly ten, Calhoun went out to where the Minister for Health paced miserably up and down the corridor outside the laboratory. The Minister looked white and sick, as if despite himself he'd been picturing the demonstration Lett would have given Calhoun. He did not meet Calhoun's eyes. He said uneasily:
"I'll take you to the Planetary President, now."
"No," said Calhoun. "I got some very promising information from Dr. Lett. I want to go back to my ship first."
"But the President is waiting to see you!" protested the Minister for Health. "There's something he wants to discuss!"
"I want," Calhoun observed, "to have something to discuss with him. There is intelligence back of this para business. I'd almost call it demoniac intelligence. I want to get back to my ship and check on what I got from Dr. Lett."
The Minister for Health hesitated, and then said urgently:
"But the President is extremely anxious——"
"Will you," asked Calhoun politely, "arrange for me to be taken back to my ship?"
The Minister for Health opened his mouth and closed it. Then he said apologetically—and it seemed to Calhoun—fearfully:
"Dr. Lett has been our only hope of conquering this ... this epidemic. The President and the Cabinet felt that they had to ... give him full authority. There was no other hope! We didn't know you'd come. So ... Dr. Lett wished you to see the President when you left him. It won't take long!"
Calhoun said grimly:
"And he already has you scared! I begin to suspect I haven't even time to argue with you!"
"I'll get you a car and driver as soon as you've seen the President. It's only a little thing——"
Calhoun growled and moved toward the exit from the laboratory. Past the sentries. Out to the open air. Here was the wide clear space which once had been a park for the city and the site of the government building of Tallien Three. A little distance away, children played gaily. But there were women who watched them with deep anxiety. This particular space contained all the people considered certainly free of the para syndrome. Tall building surrounded the area which once had been tranquil and open to all the citizens of the planet. But now those buildings were converted into walls to shut out all but the chosen—and the chosen were no better off for having been someone's choice.
"The capital building's over yonder," said the Minister, at once urgently and affrightedly and persuasively. "It's only a very short walk! Just yonder!"
"I still," said Calhoun, "don't want to go there." He showed the Minister for Health the blaster he'd aimed at Dr. Lett only minutes ago. "This is a blaster," he said gently. "It's adjusted for low power so that it doesn't necessarily burn or kill. It's the adjustment used by police in case of riot. With luck, it only stuns. I used it on Dr. Lett," he added unemotionally. "He's a para. Did you know? The vaccine he's been giving to certain high officials to protect them against becoming para—it satisfies the monstrous appetite of para without requiring them to eat scavengers. But it also produces that appetite. In fact, it's one of the ways by which paras are made."
The Minister for Health stared at Calhoun. His face went literally gray. He tried to speak, and could not.
Calhoun added again, as unemotionally as before:
"I left Dr. Lett unconscious in his laboratory, knocked out by a low-power blaster bolt. He knows he's a para. The President is a para, but with a supply of 'vaccine' he can deny it to himself. By the look on your face you've just found out you can't deny it to yourself any longer. You're a para, too."
The Minister for Health made an inarticulate sound. He literally wrung his hands.
"So," said Calhoun, "I want to get back to my ship and see what I can do with the 'vaccine' I took from Dr. Lett. Do you help me, or don't you?"
The Minister for Health seemed to have shriveled inside his garments. He wrung his hands again. Then a ground car braked to a stop five yards away. Two uniformed men jumped out. The first of them jerked at his blaster in its holster on his hip.
"That's thetormal!" he snapped. "This's the man, all right!"
Calhoun pulled the trigger of his blaster three times. It whined instead of rasping, because of its low-power setting. The Minister for Health collapsed. Before he touched ground the nearer of the two uniformed men seemed to stumble with his blaster halfway drawn. The third man toppled.
"Murgatroyd!" said Calhoun sharply.
"Chee!" shrilled Murgatroyd. He leaped into the ground car beside Calhoun.
The motor squealed because of the violence with which Calhoun applied the power. It went shrilly away with three limp figures left behind upon the ground. But there wouldn't be instant investigation. The atmosphere in Government Center was not exactly normal. People looked apprehensively at them. But Calhoun was out of sight before the first of them stirred.
"It's the devil," said Calhoun as he swung to the right at a roadway curve, "to have scruples! If I'd killed Lett in cold blood, I'd have been the only hope these people could have! Maybe they'd have let me help them!"
He made another turn. There were buildings here and there, and he was hardly out of sight of where he'd dropped three men. But it was astonishing that action had been taken so quickly after Lett regained consciousness. Calhoun had certainly left him not more than a quarter of an hour before. The low-power blaster must have kept him stunned for minutes. But immediately he'd recovered he'd issued orders for the capture or the killing of a man with a small animal with him, atormal. And the order would have been carried out if Calhoun hadn't happen to have his own blaster actually in his hand.
But the appalling thing was the over-all situation as now revealed. The people of Government Center were turning para and Dr. Lett had all the authority of the government behind him. He was the government for the duration of the emergency. But he'd stay the government because all the men in high office were paras who could conceal their condition only so long as Dr. Lett permitted it. Calhoun could picture the social organization to be expected. There'd be the tyrant; the absolute monarch at its head. Absolutely submissive citizens would receive their dosage of vaccine to keep them "normals" so long as it pleased their masters. Anyone who defied him or even tried to flee would become something both mad and repulsive, because subject to monstrous and irresistible appetite. And the tyrant could prevent even their satisfaction! So the citizens of Tallien Three were faced with an ultimate choice of slavery, or madness, for themselves and their families.
Calhoun swerved behind a government building and out of the parking area beyond. Obviously, he couldn't leave Government Center by the way he'd entered it. If Lett hadn't ordered him stopped, he'd be ordering it now. And Murgatroyd was an absolute identification.
Again he turned a corner, thrusting Murgatroyd down out of sight. He turned again, and again.... Then he began concentratedly to remember where the sunset-line had been upon the planet when he was waiting to be landed by the grid. He could guess at an hour and a half, perhaps two, since he touched ground. On the combined data, he made a guess at the local time. It would be mid-afternoon. So shadows would lie to the northeast of the objects casting them. Then—
He did not remain on any straight roadway for more than seconds. But now when he had a choice of turnings, he had a reason for each choice. He twisted and dodged about—once he almost ran into children playing a ritual game—but the sum total of his movements was steadily southward. Paras were turned out of the south gate. That gate, alone, would be the one where someone could go out with a chance of being unchallenged.
He found the gate. The usual tall buildings bordered it to left and right. The actual exit was bare concrete walls slanting together to an exit to the outer world; no more than a house-door wide. Well back from the gate, there were four high-side trucks with armed police in the truck-bodies. They were there to make sure that paras turned out, or who went out of their own accord when they knew their state, would not come back.
He stopped the ground car and tucked Murgatroyd under his coat. He walked grimly toward the narrow exit. It was the most desperate of gambles, but it was the only one he could make. He could be killed, of course, if anybody suspected him of attempting exit at any gate.
He got out, unchallenged. The concrete walls rose higher and higher as he walked away from the trucks and the police who would surely have blasted him had they guessed. The way he could walk became narrowed. It became a roofed-over passageway, with a turn in it so it could not be looked through end to end. Then—he reached open air once more.
Nothing could be less dramatic than his actual escape. He simply walked out. Nothing could be less remarkable than his arrival in the city outside of Government Center. He found himself in a city street, rather narrow, with buildings as usual all about him, whose windows were either bricked shut, or smashed. There were benches against the base of one of those buildings, and four or five men, quite unarmed, lounged upon them. When Calhoun appeared one of them looked up and then arose. A second man turned to busy himself with something behind him. They were not grim. They showed no sign of being mad. But Calhoun had already realized that the appetite which was madness came only occasionally, only at intervals which could probably be known in advance. Between one monstrous hunger-spell and another, a para might look and act and actually be as sane as anybody else. Certainly Dr. Lett and the President and the Cabinet members who were paras acted convincingly as if they were not.
One of the men on the benches beckoned.
"This way," he said casually.
Murgatroyd poked his head out of Calhoun's jacket. He regarded these roughly dressed men with suspicion.
"What's that?" asked one of the five.
"A pet," said Calhoun briefly.
The statement went unchallenged. A man got up, lifting a small tank with a hose. There was a hissing sound. The spray made a fine, foglike mist. Calhoun smelled a conventional organic solvent, well-known enough.
"This's antiseptic," said the man with the spray. "In case you got some disease inside there."
The statement was plainly standard, and once it had been exquisite irony. But it had been repeated until it had no meaning any more, except to Calhoun. His clothing glittered momentarily where the spray stood on its fibres. Then it dried. There was the faintest possible residue, like a coating of impalpable dust. Calhoun guessed its significance and the knowledge was intolerable. But he said between clenched fists.
"Where do I go now?"
"Anywheres," said the first man. "Nobody'll bother you. Some normals try to keep you from getting near'em, but you can do as you please." He added disinterestedly. "To them, too. No police out here!"
He went back to the bench and sat down. Calhoun moved on.
His inward sensations were unbearable, but he had to continue. It was not likely that instructions would have reached the para organization yet. There was one. There must be one. But eventually he would be hunted for even on the unlikely supposition that he'd gotten out of Government Center. Not yet, but presently.
He went down the street. He came to a corner and turned it. There were again a few moving figures in sight. There might be one pedestrian in a city block. This was how they'd looked in the other part of the city, seen from a ground car. On foot, they looked the same. Windows, too, were broken. Doors smashed in. Trash on the streets....
None of the humans in view paid any attention to him at all, but he kept Murgatroyd out of sight regardless. Walking men who came toward him never quite arrived. They turned off on other streets or into doorways. Those who moved in the same direction never happened to be overtaken. They also turned corners or slipped into doors. They would be, Calhoun realized dispassionately, people who still considered themselves normals, out upon desperate errands for food and trying hopelessly not to take contagion back to those they got food for. And Calhoun was shaken with a horrible rage that such things could happen. He, himself, had been sprayed with something.... And Dr. Lett had held out a plastic container for him to smell.... He'd held his breath then, but he could not keep from breathing now. He had a certain period of time, and that period only, before—
He forced his thoughts back to the Med Ship when it was twenty miles high, and ten, and five. He'd watched the ground through the electron telescope and he had a mental picture of the city from the sky. It was as clear to him as a map. He could orient himself. He could tell where he was.
A ground car came to a stop some distance ahead. A man got out, his arms full of bundles which would be food. Calhoun broke into a run. The man tried to get inside the doorway before Calhoun could arrive. But he would not leave any of the food.
Calhoun showed his blaster.
"I'm a para," he said quietly, "and I want this car. Give me the keys and you can keep the food."
The man groaned. Then he dropped the keys on the ground. He fled into the house.
"Thanks," said Calhoun politely to the emptiness.
He took his place in the car. He thrust Murgatroyd again out of sight.
"It's not," he told thetormalwith a sort of despairing humor, "that I'm ashamed of you, Murgatroyd, but I'm afraid I may become ashamed of myself. Keep low!"
He started the car and drove away.
He passed through a business district, with many smashed windows. He passed through canyons formed by office buildings. He crossed a manufacturing area, in which there were many ungainly factories but no sign of any work going on. In any epidemic many men stay home from work to avoid contagion. On Tallien Three nobody would be willing to risk employment, for fear of losing much more than his life.
There there was a wide straight highway leading away from the city but not toward the spaceport. Calhoun drove his stolen car along it. He saw the strange steel embroidery of the landing grid rising to the height of a minor mountain against the sky. He drove furiously. Beyond it. He had seen the highway system from twenty miles height, and ten, and five. From somewhere near here stolen weather rockets had gone billowing skyward with explosive war heads to shatterEsclipus Twenty.
They'd failed. Now Calhoun went past the place from which they had been launched, and did not notice. Once he could look across flat fields and see the spaceport highway. It was empty. Then there was sunset. He saw the topmost silvery beams and girders of the landing grid still glowing in sunshine which no longer reached down to the planet's solid ground.
He drove. And drove. Government Center might put a road block to the spaceport, just in case. But they'd really believe him still hiding somewhere in Government Center with no hope of—actually—accomplishing anything but his own destruction.
After sunset he was miles beyond the spaceport. When twilight was done, he'd crossed to another surface road and was headed back toward the city. But this time he would pass close to the spaceport. And two hours after sundown he turned the car's running-lights off and drove a dark and nearly noiseless vehicle through deep-fallen night. Even so, he left the ground car a mile from the tall and looming lacework of steel. He listened with straining ears for a long time.
Presently he and Murgatroyd approached the spaceport, on foot, from a rather improbable direction. The gigantic, unsubstantiated tower rose incredibly far toward the sky. As he drew near it he crouched lower and lower so he was almost crawling to keep from being silhouetted against the stars. He saw lights in the windows of the grid's control building. As he looked, a lighted window darkened from someone moving past it inside. There was an enormous stillness, broken only by faint, faint noises of the wind in the metal skeleton.
He saw no ground cars to indicate men brought here and waiting for him. He went very cautiously forward. Once he stopped and distastefully restored his blaster to lethal-charge intensity. If he had to use it, he couldn't hope to shoot accurately enough to stun an antagonist. He'd have to fight for his life—or rather, for the chance to live as a normal man, and to restore that possibility to the people in the ghastly-quiet city at the horizon and the other lesser cities elsewhere on this world.
He took infinite precautions. He saw the Med Ship standing valiantly upright on its landing fins. It was a relief to see it. The grid operator could have been ordered to lift it out to space—thrown away to nowhere, or put in orbit until it was wanted again, or....
That was still a possibility. Calhoun's expression turned wry. He'd have to do something about the grid. He must be able to take off on the ship's emergency rockets without the risk of being caught by the tremendously powerful force fields by which ships were launched and landed.
He crept close to the control building. No voices, but there was movement inside. Presently he peered in a window.
The grid operator who'd been the first man to greet him on his landing, now moved about the interior of the building. He pushed a tank on wheels. With a hose attached to it, he sprayed. Mist poured out and splashed away from the side walls. It hung in the air and settled on the desks, the chairs, and on the control board with its dials and switches. Calhoun had seen the mist before. It had been used to spray instead of burning the bodies of the two men who'd tried to murder him, and their wrecked ground car, and everywhere that the car was known to have run. It was a decontaminant spray; credited with the ability to destroy the contagion that made paras out of men.
Calhoun saw the grid operator's face. It was resolute beyond expression, but it was very, very bitter.
Calhoun went confidently to the door and knocked on it. A savage voice inside said:
"Go away! I just found out I'm a para!"
Calhoun opened the door and walked inside. Murgatroyd followed. He sneezed as the mist reached his nostrils.
"Ive been treated," said Calhoun, "so I'll be a para right along with you, after whatever the development period is. Question: Can you fix the controls so nobody else can use the grid?"
The grid operator stared at him numbly. He was deathly pale. He did not seem able to grasp what Calhoun had said.
"I've got to do some work on the para condition," Calhoun told him. "I need to be undisturbed in the ship, and I need a patient further along toward being a para than I am. It'll save time. If you'll help, we may be able to beat the thing. If not, I've still got to disable the grid."
The grid operator said in a savage, unhuman voice:
"I'm a para. I'm trying to spray everything I've touched. Then I'm going to go off somewhere and kill myself—"
Calhoun drew his blaster. He adjusted it again to non-lethal intensity.
"Good man!" he said approvingly. "I'll have a similar job to do if I'm not a better medical man than Lett! Will you help me?"
Murgatroyd sneezed again. He said plaintively:
"Chee!"
The grid's operator looked down at him, obviously in a state of shock. No ordinary sight or sound could have gotten through to his consciousness. But Murgatroyd was a small, furry animal with long whiskers and a hirsute tail and a habit of imitating the actions of humans. He sneezed yet again and looked up. There was a handkerchief in Calhoun's pocket. Murgatroyd dragged it out and held it to his face. He sneezed once more and said, "Chee!" and returned the handkerchief to its place. He regarded the grid operator disapprovingly. The operator was shocked out of his despair. He said shakenly:
"What the devil—" Then he stared at Calhoun. "Help you? How can I help anybody? I'm a para!"
"Which," said Calhoun, "is just what I need. I'm Med Service, man! I've got a job to do with what they call an epidemic! I need a para who's willing to be cured! That's you! Let's get this grid fixed so it can't work and—"
There was a succession of loud clicks from a speaker unit on the wall. It was an emergency-wave, unlocking the speaker from its Off position. Then a voice:
"All citizens attention! The Planetary President is about to give you good news about the end of the para epidemic!"
A pause. Then a grave and trembling voice came out of the speakers:
"My fellow-citizens, I have the happiness to report that a vaccine completely protecting normals against the para condition, and curing those already paras, has been developed. Dr. Lett, of the planetary health service, has produced the vaccine which is already in small-scale production and will shortly be available in large quantities, enough for everyone! The epidemic which has threatened every person on Tallien Three is about to end! And to hasten the time when every person on the planet will have the vaccine in the required dosage and at the required intervals, Dr. Lett has been given complete emergency authority. He is empowered to call upon every citizen for any labor, any sum, any sacrifice that will restore our afflicted fellow-citizens to normality, and to protect the rest against falling a victim to this intolerable disease. I repeat: a vaccine has been found which absolutely prevents anyone from becoming a para, and which cures those who are paras now. And Dr. Lett has absolute authority to issue any orders he feels necessary to hasten the end of the epidemic and to prevent its return. But the end is sure!"
The speaker clicked off. Calhoun said wryly:
"Unfortunately, I know what that means. The President has announced the government's abdication in favor of Dr. Lett, and that the punishment for disobeying Lett is—madness."
He drew a deep breath and shrugged his shoulders.
"Come along! Let's get to work!"
As it happened, the timing was critical, though Calhoun hadn't realized it. There were moving lights on the highway to the city at the moment Calhoun and the grid operator went into the Med Ship and closed the air-lock door behind them. The lights drew nearer. They raced. Then ground cars came rushing through the gate of the spaceport and flung themselves toward the wholly peaceful little Med Ship where it stood seeming to yearn toward the sky. In seconds they had it ringed about, and armed men were trying to get inside. But Med Ships land on very many planets, with very many degrees of respect for the Interstellar Medical Service. On some worlds there is great integrity displayed by spaceport personnel and visitors. On others there is pilfering, or worse. So Med Ships are not easily broken into.
They spent long minutes fumbling unskillfully at the outer air-lock door. Then they gave it up. Two car loads of men went over to the control building, which now was dark and silent. Its door was not locked. They went in.
There was consternation. The interior of the control building reeked of antiseptic spray—the spray used when a para was discovered. In some cases, the spray a para used when he discovered himself. But it was not reassuring to the men just arrived from Government Center. Instead of certifying to their safety, it told of horrifying danger. Because despite a broadcast by the planetary president, terror of paras was too well-established to be cured by an official statement.
The men who'd entered the building stumbled out and stammered of what they'd smelled inside the building. Their companions drew back, frightened by even so indirect a contact with supposed contagion. They stayed outside, while a man who hadn't entered used the police-car communicator to report to the headquarters of the planetary police.
The attempt to enter the ship was known inside, of course. But Calhoun paid no attention. He emptied the pockets of the garments he'd worn into the city. There were the usual trivia a man carries with him. But there was also a blaster—set for lower-power bolts—and a small thick-glass phial of a singular grayish fluid, and a plastic container.
He was changing to other clothing when he heard the muttering report, picked up by a ship-receiver tuned to planetary police wave length. It reported affrightedly that the Med Ship could not be entered, and the grid's control building was dark and empty and sprayed as if to destroy contagion. The operator was gone.
Another voice snapped orders in reply. The highest authority had given instructions that the Med Ship man now somewhere in the capital city must be captured, and his escape from the planet must be prevented at all costs. So if the ship itself could not be entered and disabled, get the grid working and throw it away. Throw it out to space! Whether there was contagion in the control building or not, the ship must be made unusable to the Med Ship man!
"They think well of me," said Calhoun. "I hope I'm as dangerous as Dr. Lett now believes." Then he said crisply: "You say you're a para. I want the symptoms: how you feel and where. Then I want to know your last contact with scavengers."
The intentions of the police outside could be ignored. It wouldn't matter if the Med Ship were heaved out to space and abandoned. He was in it. But it couldn't happen. The grid operator had brought away certain essential small parts of the grid control system. Of course the ship could be blown up. But he'd have warning of that. He was safe except for one thing. He'd been exposed to whatever it was that made a man a para. The condition would develop. But he did have a thick-glass container of grayish fluid, and he had a plastic biological-specimen container. One came from Dr. Lett's safest pocket. It would be vaccine. The other came from the culture oven in the doctor's laboratory.
The thick-glass phial was simply that. Calhoun removed the cover from the other. It contained small and horrible squirming organisms, writhing in what was probably a nutrient fluid to which they could reduce human refuse. They swarm jerkily in it so that the liquid seemed to seethe. It smelled. Like skunk.
The grid operator clenched his hands.
"Put it away!" he commanded fiercely. "Out of sight! Away!"
Calhoun nodded. He locked it in a small chest. As he put down the cover he said in an indescribable tone:
"It doesn't smell as bad to me as it did."
But his hands were steady as he drew a sample of a few drops from the vaccine bottle. He lowered a wall panel and behind it there was a minute but astonishingly complete biological laboratory. It was designed for microanalysis—the quantitative and qualitative analysis of tiny quantities of matter. He swung out a miniaturized Challis fractionator. He inserted half a droplet of the supposed vaccine and plugged in the fractionator's power cable. It began to hum.
The grid operator ground his teeth.
"This is a fractionator," said Calhoun. "It spins a biological sample through a chromatograph gele."
The small device hummed more shrilly. The sound rose in pitch until it was a whine, and then a whistle, and then went up above the highest pitch to which human ears are sensitive. Murgatroyd scratched at his ears and complained:
"Chee! Chee! Chee!"
"It won't be long," Calhoun assured him. He looked once at the grid operator and then looked away. There was sweat on the man's forehead. Calhoun said casually: "The substance that makes the vaccine do what it does do is in the vaccine, obviously. So the fractionator is separating the different substances that are mixed together." He added, "It doesn't look much like chromatography, but the principle's the same. It's an old, old trick!"
It was, of course. That different dissolved substances can be separated by their different rates of diffusion through wetted powders and geles had been known since the early twentieth century, but was largely forgotten because not often needed. But the Med Service did not abandon processes solely because they were not new.
Calhoun took another droplet of the vaccine and put it between two plates of glass, to spread out. He separated them and put them in a vacuum drier.
"I'm not going to try an analysis," he observed. "It would be silly to try to do anything so complicated if I only need to identify something. Which I hope is all I do need!"
He brought out an extremely small vacuum device. He cleaned the garments he'd just removed, drawing every particle of dust from them. The dust appeared in a transparent tube which was part of the machine.
"I was sprayed with something I suspect the worst of," he added. "The spray left dust behind. Ithinkit made sure that anybody who left Government Center would surely be a para. It's another reason for haste."
The grid operator ground his teeth again. He did not really hear Calhoun. He was deep in a private hell of shame and horror.
The inside of the ship was quiet, but it was not tranquil. Calhoun worked calmly enough, but there were times when his inwards seemed to knot and cramp him, which was not the result of any infection or contagion or demoniac possession, but was reaction to thoughts of the imprisoned para in the laboratory. That man had gobbled the unspeakable because he could not help himself, but he was mad with rage and shame over what he had become. Calhoun could become like that—
The loud-speaker tuned to outside frequencies muttered again. Calhoun turned up its volume.
"Calling Headquarters!" panted a voice. "There's a mob of paras forming in the streets in the Mooreton quarter! They're raging! They heard the President's speech and they swear they'll kill him! They won't stand for a cure! Everybody's got to turn para! They won't have normals on the planet! Everybody's got to turn para or be killed!"
The grid operator looked up at the speaker. The ultimate of bitterness appeared on his face. He saw Calhoun's eyes on him and said savagely:
"That's where I belong!"
Murgatroyd headed straight for his cubbyhole and crawled into it.
Calhoun got out a microscope. He examined the dried glass plates from the vacuum drier. The fractionator turned itself off and he focused on and studied the slide it yielded. He inspected a sample of the dust he'd gotten from the garments that had been sprayed at the south gate. The dust contained common dust particles and pollen particles and thread particles and all sorts of microscopic debris. But throughout all the sample he saw certain infinitely tiny crystals. They were too small to be seen separately by the naked eye, but they had a definite crystalline form. And the kind of crystals a substance makes are not too specific about what the substance is, but they tell a great deal about what it cannot be. In the fractionator slide he could get more information—the rate-of-diffusion of a substance in solution ruled out all but a certain number of compounds that it could be. The two items together gave a definite clue.
Another voice from the speaker:
"Headquarters! Paras are massing by the north gate! They act ugly! They're trying to force their way into Government Center! We'll have to start shooting if we're to stop them! What are our orders?"
The grid operator said dully:
"They'll wreck everything. I don't want to live because I'm a para, but I haven't acted like one yet. Not yet! But they have! So they don't want to be cured! They'd never forget what they've done. They'd be ashamed!"
Calhoun punched keys on a very small computer. He'd gotten an index-of-refraction reading on crystals too small to be seen except through a microscope. That information, plus specific gravity, plus crystalline form, plus rate of diffusion in a fractionator, went to the stores of information in the computer's memory banks somewhere between the ship's living quarters and its outer skin.
A voice boomed from another speaker, tuned to public-broadcast frequency:
"My fellow-citizens, I appeal to you to be calm! I beg you to be patient! Practice the self-control that citizens owe to themselves and their world, I appeal to you...."
Outside in the starlight the Med Ship rested peacefully on the ground. Around and above it the grid rose like geometric fantasy to veil most of the starry sky. Here in the starlight the ground-car communicators gave out the same voice. The same message. The President of Tallien Three made a speech. Earlier, he'd made another. Earlier still he'd taken orders from the man who was already absolute master of the population of this planet.
Police stood uneasy guard about the Med Ship because they could not enter it. Some of their number who had entered the control building now stood shivering outside it, unable to force themselves inside again. There was a vast, detached stillness about the spaceport. It seemed the more unearthly because of the thin music of wind in the landing grid's upper levels.
At the horizon there was a faint glow. Street lights still burned in the planet's capitol city, but though buildings rose against the sky no lights burned in them. It was not wise for anybody to burn lights that could be seen outside their dwellings. There were police, to be sure. But they were all in Government Center, marshaled there to try to hold a perimeter formed by bricked-up apartment buildings. But most of the city was dark and terribly empty save for mobs of all sizes but all raging. Nine-tenths of the city was at the mercy of the paras. Families darkened their homes and, terrified, hid in corners and in closets, listening for outcries or the thunderous tramping of madmen at their doors.
In the Med Ship the loud-speaker went on:
"I have told you," said the rounded tones of the Planetary President—but his voice shook, "I have told you that Dr. Lett has perfected and is making a vaccine which will protect every citizen and cure every para. You must believe me, my fellow-citizens. You must believe me! To paras, I promise that their fellows who were not afflicted with the same condition will forget! I promise that no one will remember what... what has been done in delirium! What has taken place—and there have been tragedies—will be blotted out. Only be patient now! Only...."
Calhoun went over his glass slides again while the computer stood motionless, apparently without life. But he had called for it to find, in its memory banks, an organic compound of such-and-such a crystalline form, such-and-such a diffusion rate, such-and-such a specific gravity, and such-an-such a refractive index. Men no longer considered that there was any effective limit to the number of organic compounds that were possible. The old guess at half a million different substances was long exceeded. It took time even for a computer to search all its microfilmed memories for a compound such as Calhoun had described.
He paced restlessly while the computer consulted its memory with faint whirrings of cooling blowers, and occasional chucklings as memory cubes full of exceedingly complex stereomolecules of recorded information were searched.
"Maybe," Calhoun said, "this isn't so much a new disease as a modification of a very old one. The very ancient Hate Disease—for the most important symptom of this particular malady is the hate it's stirred up. I've seen a number of sick planets—but the hate index on this one earns it a record score." He paused for a moment as the computer did an extra-special burping chuckle, and slipped in an entire new case of memory cubes. "Hm-m-m ... if what we're looking for is a vaccine against hate we'd really have something.
"But I'm afraid not. That's too happy an outcome. We'll just call this Hate Disease, Tallien Three strain. It's standard practice," Calhoun continued, "to consider that everything that can happen, does. Specifically, that any compound that can possibly exist, sooner or later must be formed in nature. We're looking for a particular one. It must have been formed naturally at some time or another, but never before has it appeared in quantity enough to threaten a civilization. Why?"
Murgatroyd licked his right-hand whiskers. He whimpered a little—and Murgatroyd was a very cheerful small animal, possessed of exuberant health and a fine zest in simply being alive. Exposed to contagion, it was the admirable talent of his kind to react instantly and violently, producing antibodies so promptly that no conceivable disease could develop.Tormalswere cherished and respected members of the Interstellar Medical Service because they could produce within hours antibodies for any possible infection, and the synthesis of such antibodies could be begun and any possible plague defeated. But Murgatroyd was not happy now.
"It's been known for a long time," said Calhoun impatiently, "that no form exists alone. Every living creature exists in an environment, in association with all the other living creatures around it. But this is true of compounds, too! Anything that is part of an environment is essential to that environment. So even organic compounds are as much parts of a planetary life system as ... say ... rabbits on a Terran type world. If there are no predators, rabbits will multiply until they starve."
Murgatroyd said, "Chee!" as if complaining to himself.
"Rats," said Calhoun somehow angrily, "have been known to do that on a derelict ship. There was a man named Malthus who said we humans would some day do the same thing. But we haven't. We've take over a galaxy. If we ever crowd this, there are more galaxies for us to colonize, forever! But there have been cases of rats and rabbits multiplying past endurance. Here we've got an organic molecule that has multiplied out of all reason! It's normal for it to exist, but in a normal environment it's held in check by other molecules which in some sense feed on it; which control the population of this kind of molecule as rabbits or rats are controlled in a larger environment. But the check on this molecule isn't working, here!"
The booming voice of the Planetary President went on and on and on. Memoranda of events taking place were handed to him, and he read them and argued with the paras who had tried to rush the north gate of Government Center, to make its inhabitants paras like themselves. But the Planetary President tried to make oratory a weapon against madness.
Calhoun grimaced at the voice. He said fretfully:
"There's a molecule which has to exist because it can. It's a part of a normal environment, but it doesn't normally produce paras. Now it does! Why? What is the compound or the condition that controls its abundance? Why is it missing here? What is lacking? What?"
The police-frequency speaker suddenly rattled, as if someone shouted into a microphone.
"All police cars! Paras have broken through a building wall on the west side! They're pouring into the Center! All cars rush! Set blasters at full power and use them! Drive them back or kill them!"
The grid operator turned angry, bitter eyes upon Calhoun.
"The paras—we paras!—don't want to be cured!" he said fiercely. "Who'd want to be normal again and remember when he ate scavengers? I haven't yet, but—who'd be able to talk to a man he knew had devoured ... devoured—" The grid operator swallowed. "We paras want everybody to be like us, so we can endure being what we are! We can't take it any other way—except by dying!"
He stood up. He reached for the blaster Calhoun had put aside when he changed from the clothes he'd worn in the city.
"...And I'll take it that way!"
Calhoun whirled. His fist snapped out. The grid operator reeled out. The blaster dropped from his hand. Murgatroyd cried out shrilly, from his cubbyhole. He hated violence, did Murgatroyd.
Calhoun stood over the operator, raging:
"It's not that bad yet! You haven't yawned once! You can stand the need for monstrousness for a long while yet! And I need you!"
He turned away. The President's voice boomed. It cut off abruptly. Another voice took its place. And this was the bland and unctuous voice of Dr. Lett.
"My friends! I am Dr. Lett! I have been entrusted with all the powers of the government because I, and I alone, have all the power over the cause of the para condition. From this moment I am the government! To paras—you need not be cured unless you choose. There will be places and free supplies for you to enjoy the deep satisfactions known only to you! To nonparas—you will be protected from becoming paras except by your own choice. In return, you will obey! The price of protection is obedience. The penalty for disobedience will be loss of protection. But those from whom protection is withdrawn will not be supplied with their necessities! Paras, you will remember this! Nonparas, do not forget it!" His voice changed. "Now I give an order! To the police and to nonparas: You will no longer resist paras! To paras: You will enter Government Center quietly and peacefully. You will not molest the nonparas you come upon. I begin at once the organization of a new social system in which paras and nonparas must co-operate. There must be obedience to the utmost—"
The grid operator cursed as he rose from the floor. Calhoun did not notice. The computer had finally delivered a strip of paper on which was the answer he had demanded. And it was of no use. Calhoun said tonelessly:
"Turn that off, will you?"
While the grid operator obeyed, Calhoun read and reread the strip of tape. He had lacked something of good color before, but as he reread, he grew paler and paler. Murgatroyd got down restlessly from his cubbyhole. He sniffed. He went toward the small locked chest in which Calhoun had put away the plastic container of living scavengers. He put his nose to the crack of that chest's cover.
"Chee!" he said confidently. He looked at Calhoun. Calhoun did not notice.
"This," said Calhoun, completely white, "This is bad! It's ... it's an answer, but it would take time to work it out, and we haven't got the time! And to make it and to distribute it—"
The grid operator growled. Dr. Lett's broadcast had verified everything Calhoun said. Dr. Lett was now the government of Tallien Three. There was nobody who could dare oppose him. He could make anybody into a para, and then deny that para his unspeakable necessities. He could turn anybody on the planet into a madman with ferocious and intolerable appetites, and then deny them their satisfaction. The people of Tallien Three were the slaves of Dr. Lett. The grid operator said in a deadly voice:
"Maybe I can get to him and kill him before—"
Calhoun shook his head. Then he saw Murgatroyd sniffing at the chest now holding the container of live scavengers. Open, it had had a faint but utterly disgusting odor. Locked up, Calhoun could not smell it. But Murgatroyd could. He sniffed. He said impatiently to Calhoun:
"Chee! Chee-chee!"
Calhoun stared. His lips tightened. It was the function of thetormalmembers of the Med Service to react to any infection more swiftly than humans could do, and to develop antibodies which destroyed that infection and could be synthesized to cure it in humans. But Murgatroyd was immune only to infections. To toxins. He was not immune to an appetite-causing molecule demanding more of itself on penalty of madness. Murgatroyd had no more inherent resistance than a man.
"Chee-chee!" he chattered urgently. "Chee-chee-chee!"
"It's got him," said Calhoun. He felt sickened. "It'll have me. Because I can't synthesize anything as complex as the computer says is needed to control the molecular population that makes paras!"
Murgatroyd chattered again. He was indignant. He wanted something and Calhoun didn't give it to him. He could not understand so preposterous a happening. He reached up and tugged at Calhoun's trouser-leg. Calhoun picked him up and tossed him the width of the control room. He'd done it often, in play, but this was somehow different. Murgatroyd stared incredulously at Calhoun.
"To break it down," said Calhoun bitterly, "I need aromatic olefines and some acetone, and acetic-acid radicals and methyl submolecular groups. To destroy it absolutely I need available unsaturated hydrocarbons—they'll be gases! And it has to be kept from reforming as it's broken up, and I may need twenty different organic radicals available at the same time! It's a month's work for a dozen competent men just to find out how to make it, and I'd have to make it in quantity for millions of people and persuade them of its necessity against all the authority of the government and the hatred of the paras, and then distribute it—"