III

"That pattern of human conduct which is loosely called

"self-respecting" has the curious property of restricting to

the individual--through his withdrawal of acts to communicate

misfortune--the unfavorable chance occurrences which probability

insists must take place. On the other hand, the same pattern of

human conduct tends to disseminate and to share chance favorable

occurrences among the group. The members of a group of persons

practicing "self-respect," then, increase the mathematical

probability of good fortune to all their number. This explains

the instability of cultures in which principles leading to this

type of behavior become obsolete. A decadent society brings bad

luck upon itself by the operation of the laws of probability...."

_Probability and Human Conduct_

Fitzgerald

She came very slowly back to consciousness. It was almost as if she

waked from utterly exhausted sleep. When she first opened her eyes,

they wandered vaguely until they fell upon Calhoun. Then a bitter and

contemptuous hatred filled them. Her hand fumbled weakly to the knife

at her waist. It was not a good weapon. It had been table-cutlery and

the handle was much too slender to permit a grip by which somebody

could be killed. Calhoun bent over and took the knife away from her. It

had been ground unskillfully to a point.

"In my capacity as your doctor," he told her, "I must forbid you to

stab me. It wouldn't be good for you." Then he said, "Look! My name's

Calhoun. I came from Sector Med Headquarters to make a planetary health

inspection, and some lads in the city apparently didn't want a Med Ship

aground. So they tried to kill me by buttering me all over the walls

of my ship, with the landing-grid field. I made what was practically a

crash landing, and now I need to know what's up."

The burning hatred remained in her eyes, but there was a trace of

doubt.

"Here," said Calhoun, "is my identification."

He showed her the highly official documents which gave him vast

authority--where a planetary government was willing to concede it.

"Of course," he added, "papers can be stolen. But I have a witness that

I'm what and who I say I am. You've heard of _tormals_? Murgatroyd will

vouch for me."

He called his small and furry companion. Murgatroyd advanced and

politely offered a small, prehensile paw. He said "_Chee_" in his

shrill voice, and then solemnly took hold of the girl's wrist in

imitation of Calhoun's previous action of feeling her pulse.

Calhoun watched. The girl stared at Murgatroyd. But all the galaxy had

heard of _tormals_. They'd been found on a planet in the Deneb region,

and they were engaging pets and displayed an extraordinary immunity to

the diseases men were apt to scatter in their interstellar journeyings.

A forgotten Med Service researcher made an investigation on the ability

of _tormals_ to live in contact with men. He came up with a discovery

which made them very much too valuable to have their lives wasted in

mere sociability. There were still not enough of Murgatroyd's kind to

meet the need that men had of them, and laymen had to forego their

distinctly charming society. So Murgatroyd was an identification.

The girl said faintly:

"If you'd only come earlier.... But it's too late now! I ... thought

you came from the city."

"I was headed there," said Calhoun.

"They'll kill you--"

"Yes," agreed Calhoun, "they probably will. But right now you're ill

and I'm Med Service. I suspect there's been an epidemic of some disease

here, and that for some reason the people in the city don't want the

Med Service to know about it. You seem to have ... whatever it is. Also

you had a very curious weapon to shoot me with."

The girl said drearily:

"One of our group had made a hobby of such things. Ancient weapons.

He had bows and arrows and--what I shot you with was a crossbow. It

doesn't need power. Not even chemical explosives. So, when we ran away

from the city, he ventured back in and armed us as well as he could."

* * * * *

Calhoun nodded. A little irrelevant talk is always useful at the

beginning of a patient-interview. But what she said was not irrelevant.

A group of people had fled the city. They'd needed arms, and one of

their number had "ventured" back into the city for them. He'd known

where to find only reconstructions of ancient lethal devices--a hobby

collection. It sounded like people of the civil-service type. Of course

there were no longer social classes separated by income. Not on most

worlds, anyhow. But there were social groupings based on similar

tastes, which had led to similar occupations and went on to natural

congeniality. Calhoun placed her, now. He remembered a long-out-moded

term, "upper middle class" which no longer meant anything in economics

but did in medicine.

"I'd like a case-history," he said conversationally. "Name?"

"Helen Jons," she said wearily.

He held the mike of his pocket recorder to pick up her answers.

Occupation, statistician. She'd been a member of the office force which

was needed during the building of the city. When the construction work

was finished, most of the workmen returned to the mother-world Dettra,

but the office staff stayed on to organize things when colonists should

arrive.

The plague appeared among the last shipload of workmen waiting to be

returned to the mother world. There were about a thousand persons

in the city altogether. The disease produced, at first, no obvious

physical symptoms, but those afflicted with it tended to be listless

and lackadaisical and without energy. The first-noticed symptom was

a cessation of gripes and quarrelings among the workmen. Shortness

of breath appeared two days later. It was progressive. Deaths

began in two weeks. Men sank into unconsciousness and died. By the

time the transport-ship arrived from Dettra with colonists to be

landed ... it was to take back the workmen ... the physicians on

the planet were grim. They described the situation by space phone.

The transport returned to Dettra without removing the workmen or

landing the colonists. The people left in the city on Maris III were

self-quarantined, but they expected help.

It was two months before another ship arrived. By then fewer than

two hundred of the original thousand remained. More than half those

survivors were already listless and short-breathed. A good ten per cent

were in the beginning of that marked lethargy which deepened into coma

and ended fatally. A desperate, gaunt, plague-stricken few still manned

the landing grid.

The ship came down. Men disembarked. There was no crowd to greet them.

The survivors still in the city had scattered themselves widely,

hoping to escape the contagion by isolating themselves in new and

uncontaminated dwelling-units. But there was no lack of communication

facilities. Nearly all the survivors watched on vision screens in

contact with the landing grid.

The newcomers did not look like doctors, nor act like them. Visiphone

contact with the landing grid was immediately broken. It could not be

restored. So the isolated groups spoke agitatedly to each other by

other visiphone contacts, exchanging messages of desperate hope. Then,

new-landed men appeared at an apartment whose occupant was in the act

of such a conversation with a group in a distant building. He left

the visiphone on as he went to admit and greet the men he hoped were

researchers, at least, come to find the cause of the plague and end it.

The viewer at the other visiphone plate gazed eagerly into his friend's

apartment. He saw a group of the newcomers admitted. He saw them

deliberately murder his friend and the survivors of his family.

Plague-stricken or merely terrified people--in pairs or trios widely

separated through the city--communicated in swift desperation. It was

possible that there had been a mistake--a blunder; an unauthorized

crime had been committed. But it was not a mistake. Unthinkable as such

an idea was, there developed evidence that the plague on Maris III was

to be ended as if it were an epizootic among animals. Those who had it

and those who had been exposed to it were to be killed to prevent its

spread among the newcomers.

A conviction of such horror could not be accepted without absolute

proof. But when night fell, the public power-supply of the city was cut

off--communications ended. The singular sunset hush of Maris III left

utter stillness everywhere--and there were screams which echoed among

the city's innumerable empty-eyed, unoccupied buildings.

The scant remainder of the plague-survivors fled in the night. They

fled singly, carrying the plague with them. Some carried members of

their families already stricken. Some helped already-doomed wives or

friends or husbands to the open country. Flight would not save their

lives. It would only prevent their murder. But somehow that seemed a

thing to be attempted.

* * * * *

"This," said Calhoun, "is not a history of your own case. When did you

develop the disease ... whatever it may be?"

"Don't you know what it is?" asked Helen hopelessly.

"Not yet," admitted Calhoun. "I've very little information. I'm trying

to get more now."

What other information he had he'd gathered from a newly dead man in a

field some miles away. He did not mention that at this moment.

The girl went on, exhaustedly. The first symptom was listlessness, of

which the victim was unconscious. One could pull out of it with an

effort, but one wasn't aware that anything was wrong. The listlessness

progressed. One could realize it only by recognizing the more urgent,

more violent effort needed to pay attention, and the discovery of

weakness when one tried to act. One did not feel discomfort--not even

hunger or thirst. One had to summon increasing resolution even to

become aware of the need to do anything at all.

The symptoms were singularly like those of a man too long at too high

an altitude without oxygen. They were even more like those of a man

in a non-pressurized flier whose oxygen supply has been cut off. But

such a man would pass out without realizing that he was slipping into

unconsciousness. On Maris III the process was infinitely gradual. It

was a matter of two weeks or more.

"I'd been infected before we ran away," she said drearily. "I didn't

know it then. Now I know I've a few more days of being able to think

and act ... if I try hard enough. But it'll be less and less each day.

Then I'll stop being able to try."

Calhoun watched the tiny recorder roll its multiple-channel tape from

one spool to the other as she talked.

"You had energy enough to try to kill me," he observed.

He looked at the weapon. There was an arched steel spring placed

crosswise at the end of a barrel like a sporting blast-rifle. Now he

saw a handle and a ratchet by which the spring was brought to tension,

storing up power to throw the missile. He asked:

"Who wound up this crossbow?"

Helen hesitated.

"Kim ... Kim Walpole."

"You're not a solitary refugee now? There are others of your group

still alive?"

She hesitated again, and then said:

"Some of us came to realize that staying apart didn't matter. We ...

couldn't hope to live, anyhow. We ... already had the plague. Kim

is ... one of us. He's the strongest. He ... wound up the crossbow for

me. He ... had the weapons to begin with."

Calhoun asked seemingly casual questions. She told him of a group of

fugitives remaining together because all were already doomed. There

had been eleven of them. Two were dead, now. Three others were in

the last lethargy. It was impossible to feed them. They were dying.

The strongest was Kim Walpole, who'd ventured back into the city to

bring out weapons for the rest. He'd led them, and now was still the

strongest and--so the girl considered--the wisest of them all.

They were waiting to die. But the newcomers to the planet--the

invaders, they believed--were not content to let them wait. Groups and

single hunters came out of the city and searched for them.

"Probably," said the girl dispassionately, "to burn our bodies

against contagion. They ... kill us so they won't have to wait. And

it's just ... seemed so horrible that we ... felt we ought to defend

our right to die naturally by ... dying fighting. That's why I ... shot

at you. I shouldn't have, but--"

She stopped, helplessly. Calhoun nodded.

The fugitives now aided each other simply to avoid murder. They

gathered together exhaustedly at nightfall, and those who were

strongest did what they could for the others. By day, those who

could walk scattered to separate hiding places, so that if one were

discovered, the others might still escape the indignity of being

butchered. They had no stronger motive than that. They were merely

trying to die with dignity, instead of being killed as sick beasts.

Which bespoke a tradition and an attitude which Calhoun approved.

People like these would know something of the science of probability in

human conduct. Only they would call it ethics. But the strangers--the

invaders--the occupiers of the city were of another type. They probably

came from another world.

"I don't like this," said Calhoun coldly. "Just a moment."

He went over to Murgatroyd. Murgatroyd seemed to droop a little.

Calhoun checked his breathing and listened to his heart. Murgatroyd

submitted, saying only "_Chee_" when Calhoun put him down.

"I'm going to help you to your rendezvous," said Calhoun abruptly.

"Murgatroyd's got the plague now. I ... exposed him to it, and he's

reacting fast. And I want to see the others of your group before

nightfall."

The girl just managed to get to her feet. Even speaking had tired her,

but she gamely though wearily moved off at a slant to the hillside's

slope. Calhoun picked up the odd weapon and examined it thoughtfully.

He wound it up as it was obviously meant to be. He picked up the

missile it had fired, and put it in place. He went after the girl,

carrying it. Murgatroyd brought up the rear.

Within a quarter of a mile the girl stopped and clung swaying to the

trunk of a slender tree. It was plain that she had to rest, and

dreaded getting off her feet because of the desperate effort needed to

arise.

"I'm going to carry you," said Calhoun firmly. "You tell me the way."

He picked her up bodily and marched on. She was light. She was not a

large girl, but she should have weighed more. Calhoun still carried the

quaint ancient-type weapon without difficulty.

Murgatroyd followed as Calhoun went up a small inclination on the

greater hillside and down a very narrow ravine. Through brushwood he

pushed until he came to a small open space where shelters had been made

for a dozen or so human beings. They were utterly primitive--merely

roofs of leafy branches over frameworks of sticks. But of course they

were not intended for permanent use. They were meant only to protect

plague-stricken folk while they waited to die.

But there was disaster here. Calhoun saw it before the girl could.

There were beds of leaves underneath the shelters. There were three

bodies lying upon them. They would be those refugees in the terminal

coma which--since the girl had described it--accounted for the dead man

Calhoun had found, dead of starvation with food-plants all around him.

But now Calhoun saw something more. He swung the girl swiftly in his

arms so that she would not see. He put her gently down and said:

"Stay still. Don't move. Don't turn."

* * * * *

He went to make sure. A moment later he raged. Because it was Calhoun's

profession to combat death and illness in all its forms. He took his

profession seriously. And there are defeats, of course, which a medical

man has to accept, though unwillingly. But nobody in the profession,

and least of all a Med Ship man, could fail to be roused to fury by the

sight of people who should have been his patients, lying utterly still

with their throats cut.

He covered them with branches. He went back to Helen.

"This place has been found by somebody from the city," he told her

harshly. "The men in coma have been murdered. I advise you not to look.

At a guess, whoever did it is now trying to track down the rest of you."

He went grimly to the small open glade, searching the ground for

footprints. There was ground-cover at most places, but at the edge

of the clearing he found one set of heavy footprints going away. He

put his own foot beside a print and rested his weight on it. His foot

made a lesser depression. The other print had been made by a man

weighing more than Calhoun. Therefore it was not one of the party of

plague-victims.

He found another set of such footprints, entering the glade from

another spot.

"One man only," he said icily. "He won't think he has to be on guard,

because a city's administrative personnel--such as were left behind

for the plague to hit--doesn't usually have weapons among their

possessions. And he's confident that all of you are weak enough not to

be dangerous to him."

Helen did not turn pale. She was pale before. She stared numbly at

Calhoun. He looked grimly at the sky.

"It'll be sunset within the hour," he said savagely. "If it's the

intention of the newcomers ... the invaders to burn the bodies of all

plague victims, he'll come back here to dispose of these three. He

didn't do it before lest the smoke warn the rest of you. But he knows

the shelters held more than three people. He'll be back!"

Murgatroyd said "_Chee!_" in a bewildered fashion. He was on all fours,

and he regarded his paws as if they did not belong to him. He panted.

Calhoun checked him over. Respiration way up. Heart-action like that

of the girl Helen. His temperature was not up, but down. Calhoun said

remorsefully:

"You and I, Murgatroyd, have a bad time of it in our profession. But

mine is the worse. You don't have to play dirty tricks on me, and I've

had to, on you!"

Murgatroyd said "_Chee!_" and whimpered. Calhoun laid him gently on a

bed of leaves which was not occupied by a murdered man.

"Lie still!" he commanded. "Exercise is bad for you!"

He walked away. Murgatroyd whined faintly, but lay still as if

exhausted.

"I'm going to move you," Calhoun told the girl, "so you won't be

sighted if that man from the city comes back. And I've got to keep out

of sight for a while or your friends will mistake me for him. I count

on you to vouch for me later. Basically, I'm making an ambush." Then he

explained irritably, "I daren't try to trail him because he might not

backtrack to return here!"

He lifted the girl and placed her where she could see the glade in its

entirety, but would not be visible. He settled down himself a little

distance away. He was acutely dissatisfied with the measures he was

forced to take. He could not follow the murderer and leave Helen and

Murgatroyd unprotected, even though the murderer might find another

victim because he was not trailed. In any case Murgatroyd's life, just

now, was more important than the life of any human being on Maris III.

On him depended everything.

But Calhoun was not pleased with himself.

* * * * *

There was silence except for the normal noises of living wild things.

There were fluting sounds, which later Calhoun would be told, from

crawling creatures not too much unlike the land-turtles of Earth.

There were deep-bass hummings, which came from the throats of

miniature creatures which might roughly be described as birds. There

were chirpings which were the cries of what might be approximately

described as wild pigs--except that they weren't. But the sun Maris

sank low toward the nearer hill-crests, and behind them, and there came

a strange, expectant hush over all the landscape. At sundown on Maris

III there is a singular period when the creatures of the day are silent

and those of the night are not yet active. Nothing moved. Nothing

stirred. Even the improbable foliage was still.

It was into this stillness and this half-light that small and

intermittent rustling sounds entered. Presently there was a faint

murmur of speech. A tall, gaunt young man came out of the brushwood,

supporting a pathetically feeble old man, barely able to walk. Calhoun

made a gesture of warning as the girl Helen opened her lips to speak.

The slowly moving pair--the young man moving exhaustedly, the older man

staggering with weakness despite his help--came into the glade. The

younger helped the older to sit down. He stood panting.

A woman and a man came together, assisting each other. There was barely

light enough from the sun's afterglow to show their faces, emaciated

and white.

A fifth feeble figure came tottering out of another opening in the

brush. He was dark-bearded and broad, and he had been a powerful man.

But now the plague lay heavily upon him.

They greeted each other listlessly. They had not yet discovered those

of their number who had been murdered.

The gaunt young man summoned his strength and moved toward the shelter

where Calhoun had covered an unseemly sight with branches.

Murgatroyd whimpered.

There came another rustling sound. But this had nothing of feebleness

in it. Someone pushed branches forthrightly out of his way. He came

striding confidently into the small open space. He was well-fleshed,

and his color was excellent. Calhoun automatically judged him to be in

superlative good health, slightly over-fleshed, and of that physical

type which suffers very few psychosomatic troubles because it lives

strictly and enjoyably in the present.

Calhoun stood up. He stepped out into the fading light just as

the sturdy last-comer grinned at the group of plague-stricken

semi-skeletons.

"Back, eh?" he said amiably. "Saved me a lot of trouble. I'll make one

job of it."

With leisurely confidence he reached to the blaster at his hip.

"Drop it!" snapped Calhoun, from quartering behind him. "Drop it!"

The sturdy man whirled. He saw Calhoun with a crossbow raised to cover

him. There was light enough to show that it was not a blast-rifle--in

fact, that it was no weapon of any kind modern men would ordinarily

know. But much more significant to the sturdy man was the fact that

Calhoun wore a uniform and was in good health.

He snatched out his blast-pistol with professional alertness.

And Calhoun shot him with the crossbow. It happened that he shot him

dead.

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