One of the stones from it gave him the glimmer of an idea. It hit one of the piles of stones he'd gathered near the barrier to use as ammunition and struck sparks.
Sparks! Fire! Primitive man had made fire by striking sparks, and with some of those dry crumbly bushes as tinder...
A bush of that type grew near him. He uprooted it, took it over to the pile of stones, then patiently hit one stone against another until a spark touched the punklike wood of the bush. It went up in flames so fast that it singed his eyebrows and was burned to an ash within seconds.
But he had the idea now, and within minutes had a little fire going in the lee of the mound of sand he'd made. The tinder bushes started it, and other bushes which burned more slowly kept it a steady flame.
The tough tendrils didn't burn readily; that made the fire-bombs easy to rig and throw; a bundle of faggots tied about a small stone to give it weight and a loop of the tendril to swing it by.
He made half a dozen of them before he lighted and threw the first. It went wide, and the Roller started a quick retreat, pulling the catapult after him. But Carson had the others ready and threw them in rapid succession. The fourth wedged in the catapult's framework and did the trick. The Roller tried desperately to put out the spreading blaze by throwing sand, but its clawed tentacles would take only a spoonful at a time and its efforts were ineffectual. The catapult burned.
The Roller moved safely away from the fire and seemed to concentrate its attention on Carson. Again he felt that wave of hatred and nausea -- but more weakly; either the Roller itself was weakening or Carson had learned how to protect himself against the mental attack.
He thumbed his nose at it and then sent it scuttling back to safety with a stone. The Roller went to the back of its half of the arena and started pulling up bushes again. Probably it was going to make another catapult.
Carson verified that the barrier was still operating, and then found himself sitting in the sand beside it, suddenly too weak to stand up.
His leg throbbed steadily now and the pangs of thirst were severe. But those things paled beside the physical exhaustion that gripped his entire body.
Hell must be like this, he thought, the hell that the ancients had believed in. He fought to stay awake, and yet staying awake seemed futile, for there was nothing he could do while the barrier remained impregnable and the Roller stayed back out of range.
He tried to remember what he had read in books of archaeology about the methods of fighting used back in the days before metal and plastic. The stone missile had come first, he thought. Well, that he already had.
Bow and arrow? No; he'd tried archery once and knew his own ineptness even with a modern sportsman's dura-steel weapon, made for accuracy. With only the crude, pieced-together outfit he could make here, he doubted if he could shoot as far as he could throw a rock.
Spear? Well, he could make that. It would be useless at any distance, but would be a handy thing at close range, if he ever got to close range. Making one would help keep his mind from wandering, as it was beginning to do.
He was still beside one of the piles of stones. He sorted through it until he found one shaped roughly like a spearhead. With a smaller stone he began to chip it into shape, fashioning sharp shoulders on the sides so that if it penetrated it would not pull out again like a harpoon. A harpoon was better than a spear, maybe, for this crazy contest. If he could once get it into the Roller, and had a rope on it, he could pull the Roller up against the barrier and the stone blade of his knife would reach through that barrier, even if his hands wouldn't.
The shaft was harder to make than the head, but by splitting and joining the main stems of four of the bushes, and wrapping thejoints with the tough but thin tendrils, he got a strong shaft about four feet long, and tied the stone head in a notch cut in one end. It was crude, but strong.
With the tendrils he made himself twenty feet of line. It was light and didn't look strong, but he knew it would hold his weight and to spare. He tied one end of it to the shaft of the harpoon and the other end about his right wrist. At least, if he threw his harpoon across the barrier, he'd be able to pull it back if he missed.
He tried to stand up, to see what the Roller was doing, and found he couldn't get to his feet. On the third try, he got as far as his knees and then fell flat again.
'I've got to sleep,' he thought. 'If a showdown came now, I'd be helpless. He could come up here and kill me, if he knew. I've got to regain some strength.'
Slowly, painfully, he crawled back from the barrier.
The jar of something thudding against the sand near him wakened him from a confused and horrible dream to a more confused and horrible reality, and he opened his eyes again to blue radiance over blue sand.
How long had he slept? A minute? A day?
Another stone thudded nearer and threw sand on him. He got his arms under him and sat up. He turned round and saw the Roller twenty yards away, at the barrier.
It rolled off hastily as he sat up, not stopping until it was as far away as it could get.
He'd fallen asleep too soon, he realized, while he was still in range of the Roller's throwing. Seeing him lying motionless, it had dared come up to the barrier. Luckily, it didn't realize how weak he was, or it could have stayed there and kept on throwing stones.
He started crawling again, this time forcing himself to keep going until he was as far as he could go, until the opaque wall of the arena's outer shell was only a yard away.
Then things slipped away again....
When he awoke, nothing about him was changed, but this time he knew that he had slept a long while. The first thing he became aware of was the inside of his mouth; it was dry, caked. His tongue was swollen.
Something was wrong, he knew, as he returned slowly to full awareness. He felt less tired, the stage of utter exhaustion had passed. But there was pain, agonizing pain. It wasn't until he tried to move that he knew that it came from his leg.
He raised his head and looked down at it. It was swollen below the knee, and the swelling showed even half-way up his thigh. The plant tendrils he had tied round the protective pad of leaves now cut deeply into his flesh.
To get his knife under that imbedded lashing would have been impossible. Fortunately, the final knot was over the shin bone where the vine cut in less deeply than elsewhere. He was able, after an effort, to untie the knot.
A look under the pad of leaves showed him the worst: infection and blood poisoning. Without drugs, without even water, there wasn't a thing he could do about it, except die when the poison spread through his system.
He knew it was hopeless, then, and that he'd lost, and with him, humanity. When he died here, out there in the universe he knew, all his friends, everybody, would die too. Earth and the colonized planets would become the home of the red, rolling, alien Outsiders.
It was that thought which gave him courage to start crawling, almost blindly, towards the barrier again, pulling himself along by his arms and hands.
There was a chance in a million that he'd have strength left when he got there to throw his harpoon-spear just once, and with deadly effect, if the Roller would come up to the barrier, or if the barrier was gone.
It took him years, it seemed, to get there. The barrier wasn't gone. It was as impassable as when he'd first felt it.
The Roller wasn't at the barrier. By raising himself up on his elbows, he could see it at the back of its part of the arena, working on a wooden framework that was a half-completed duplicate of the catapult he'd destroyed.
It was moving slowly now. Undoubtedly it had weakened, too.
Carson doubted that it would ever need that second catapult. He'd be dead, he thought, before it was finished.
His mind must have slipped for a moment, for he found himself beating his fists against the barrier in futile rage, and made himself stop. He closed his eyes, tried to make himself calm.
'Hello,' said a voice.
It was a small, thin voice. He opened
his eyes and turned his head. It was a lizard.
'Go away,' Carson wanted to say. 'Go away; you're not really there, or you're there but not really talking. I'm imagining things again.'
But he couldn't talk; his throat and tongue were past all speech with the dryness. He closed his eyes again.
'Hurt,' said the voice. 'Kill. Hurt -- kill. Come.'
He opened his eyes again. The blue ten-legged lizard was still there. It ran a little way along the barrier, came back, started off again, and came back.
'Hurt,' it said. 'Kill. Come.'
Again it started off, and came back. Obviously it wanted Carson to follow it along the barrier.
He closed his eyes again. The voice kept on. The same three meaningless words. Each time he opened his eyes, it ran off and came back.
'Hurt. Kill. Come.'
Carson groaned. Since there would be no peace unless he followed the thing, he crawled after it.
Another sound, a high-pitched, squealing, came to his ears. There was something lying in the sand, writhing, squealing. Something small, blue, that looked like a lizard.
He saw it was the lizard whose legs the Roller had pulled off, so long ago. It wasn't dead; it had come back to life and was wriggling and screaming in agony.
'Hurt,' said the other lizard. 'Hurt. Kill. Kill.'
Carson understood. He took the flint knife from his belt and killed the tortured creature. The live lizard scurried off.
Carson turned back to the barrier. He leaned his hands and head against it and watched the Roller, far back, working on the new catapult.
'I could get that far,' he thought, 'if I could get through. If I could get through, I might win yet. It looks weak, too. I might -- '
And then there was another reaction of hopelessness, when pain sapped his will and he wished that he were dead, envying the lizard he'd just killed. It didn't have to live on and suffer.
He was pushing on the barrier with the flat of his hands when he noticed his arms, how thin and scrawny they were. He must really have been here a long time, for days, to get as thin as that.
For a while he was almost hysterical again, and then came a time of deep calm and thought.
The lizard he had just killed had crossed the barrier, still alive. It had come from the Roller's side; the Roller had pulled off its legs and then tossed it contemptuously at him and it had come through the barrier.
It hadn't been dead, merely unconscious. A live lizard couldn't go through the barrier, but an unconscious one could. The barrier was not a barrier, then, to living flesh, but to conscious flesh. It was a mental protection, a mental hazard.
With that thought, Carson started crawling along the barrier to make his last desperate gamble, a hope so forlorn that only a dying man would have dared try it.
He moved along the barrier to the mound of sand, about four feet high, which he'd scooped out while trying -- how many days ago? -- to dig under the barrier or to reach water. That mound lay right at the barrier, its farther slope half on one side of the barrier, half on the other.
Taking with him a rock from the pile nearby, he climbed up to the top of the dune and lay there against the barrier, so that if the barrier were taken away he'd roll on down the short slope, into the enemy territory.
He checked to be sure that the knife was safely in his rope belt, that the harpoon was in the crook of his left arm and that the twenty-foot rope fastened to it and to his wrist. Then with his right hand he raised the rock with which he would hit himself on the head. Luck would have to be with him on that blow; it would have to be hard enough to knock him out, but not hard enough to knock him out for long.
He had a hunch that the Roller was watching him, and would see him roll down through the barrier, and come to investigate. It would believe he was dead, he hoped -- he thought it had probably drawn the same deduction about the nature of the barrier that he had. But it would come cautiously; he would have a little time -- He struck himself.
Pain brought him back to consciousness, a sudden, sharp pain in his hip that was different from the pain in his head and leg. He had, thinking things out before he had struck himself, anticipated that very pain, even hoped for it, and had steeled himself against awakening with a sudden movement.
He opened his eyes just a slit, and saw that he had guessed rightly. The Roller was coming closer. It was twenty feet away; the pain that had awakened him was the stone it had tossed to see whether he was alive or dead. He lay still. It came closer, fifteen feet away, and stopped again. Carson scarcely breathed.
As nearly as possible, he was keeping his mind a blank, lest its telepathic ability detect consciousness in him. And with his mind blanked out that way, the impact of its thoughts upon his mind was shattering.
He felt sheer horror at the alienness, the di~Jèrentness of those thoughts, conveying things that he felt but could not understand or express, because no terrestrial language had words, no terrestrial brain had images to fit them. The mind of a spider, he thought, or the mind of a praying mantis or a Martian sand-serpent, raised to intelligence and put in telepathic rapport with human minds, would be a homely familiar thing, compared to this.
He understood now that the Entity had been right: Man or Roller, the universe was not a place that could hold them both.
Closer. Carson waited until it was only feet away, until its clawed tentacles reached out....
Oblivious to agony now, he sat up, raised and flung the harpoon with all the strength that remained to him. As the Roller, deeply stabbed by the harpoon, rolled away, Carson tried to get to his feet to run after it. He couldn't do that; he fell, but kept crawling.
It reached the end of the rope, and he was jerked forward by the pull on his wrist. It dragged him a few feet and then stopped. Carson kept going, pulling himself towards it hand over hand along the rope. It stopped there, tentacles trying in vain to pull out the harpoon. It seemed to shudder and quiver, and then realized that it couldn't get away, for it rolled back towards him, clawed tentacles reaching out.
Stone knife in hand, he met it. He stabbed, again and again, while those horrid claws ripped skin and flesh and muscle from his body.
He stabbed and slashed, and at last it was still.
A bell was ringing, and it took him a while after he'd opened his eyes to tell where he was and what it was. He was strapped into the seat of his scouter, and the visiplate before him showed only empty space. No Outsider ship and no impossible planet.
The bell was the communications plate signal; someone wanted him to switch power into the receiver. Purely reflex action enabled him to reach forward and throw the lever.
The face of Brander, captain of the Magellan, mother-ship of his group of scouters, flashed into the screen. His face was pale and his black eyes glowing with excitement.
'Magellan to Carson,' he snapped. 'Come on in. The fight's over. We've won!'
The screen went blank; Brander would be signalling the other scouters of his command.
Slowly, Carson set the controls for the return. Slowly, unbelievingly, he unstrapped himself from the seat and went back to get a drink at the coldwater tank. For some reason, he was unbelievably thirsty. He drank six glasses.
He leaned there against the wall, trying to think.
Had it happened? He was in good health, sound, uninjured. His thirst had been mental rather than physical; his throat hadn't been dry.
He pulled up his trouser leg and looked at the calf. There was a long white scar there, but a perfectly healed scar; it hadn't been there before. He zipped open the front of his shirt and saw that his chest and abdomen were criss-crossed with tiny, almost unnoticeable, perfectly healed scars.
It had happened!
The scouter, under automatic control, was already entering the hatch of the mother-ship. The grapples pulled it into its individual lock, and a moment later a buzzer indicated that the lock was airfilled. Carson opened the hatch and stepped outside, went through the double door of the lock.
He went right to Brander's office, went in, and saluted.
Brander still looked dazed. 'Hi, Carson,' he said. 'What you missed; what a show!'
'What happened, sir?'
'Don't know, exactly. We fired one salvo, and their whole fleet went up in dust! Whatever it was jumped from ship to ship in a flash, even the ones we hadn't aimed at and that were out of range! The whole fleet disintegrated before our eyes, and we didn't get the paint of a single ship scratched!
'We can't even claim credit for it. Must have been some unstable component in the metal they used, and our sighting shot just set it off. Man, too bad you missed all the excitement!'
Carson managed a sickly ghost of a grin, for it would be days before he'd be over the impact of his experience, but the captain wasn't watching.
'Yes, sir,' he said. Common sense, more than modesty, told him he'd be branded as the worst liar in space if he ever said any more than that. 'Yes, sir, too bad I missed all the excitement....'
Keep Out, by Fredric Brown
With no more room left on Earth, and with Mars hanging up there empty of life, somebody hit on the plan of starting a colony on the Red Planet. It meant changing the habits and physical structure of the immigrants, but that worked out fine. In fact, every possible factor was covered—except one of the flaws of human nature....
Daptine is the secret of it. Adaptine, they called it first; then it got shortened to daptine. It let us adapt.
They explained it all to us when we were ten years old; I guess they thought we were too young to understand before then, although we knew a lot of it already. They told us just after we landed on Mars.
"You're home, children," the Head Teacher told us after we had gone into the glassite dome they'd built for us there. And he told us there'd be a special lecture for us that evening, an important one that we must all attend.
And that evening he told us the whole story and the whys and wherefores. He stood up before us. He had to wear a heated space suit and helmet, of course, because the temperature in the dome was comfortable for us but already freezing cold for him and the air was already too thin for him to breathe. His voice came to us by radio from inside his helmet.
Anthology of Speculative Fiction, Volume One Page 95