As he sat up, shaking his head to clear it, he saw something coming through the air towards him, and threw himself flat again on the sand, to one side. He got his body out of the way, but there was a sudden sharp pain in the calf of his left leg.
He rolled backwards, ignoring the pain, and scrambled to his feet. It was a rock, he saw now, that had struck him. And the Roller was picking up another, swinging it back gripped between two tentacles, ready to throw again.
It sailed through the air towards him, but he was able to step out of its way. The Roller, apparently, could throw straight, but neither hard nor far. The first rock had struck him only because he had been sitting down and had not seen it coming until it was almost upon him.
Even as he stepped aside from that weak second throw Carson drew back his right arm and let fly with the rock that was still in his hand. If missiles, he thought with elation, can cross the barrier, then two can play at the game of throwing them.
He couldn’t miss a three-foot sphere at only four-yard range, and he didn’t miss. The rock whizzed straight, and with a speed several times that of the missiles the Roller had thrown. It hit dead centre, but hit flat instead of point first. But it hit with a resounding thump, and obviously hurt. The Roller had been reaching for another rock, but changed its mind and got out of there instead. By the time Carson could pick up and throw another rock, the Roller was forty yards back from the barrier and going strong.
His second throw missed by feet, and his third throw was short. The Roller was out of range of any missile heavy enough to be damaging.
Carson grinned. That round had been his.
He stopped grinning as he bent over to examine the calf of his leg. A jagged edge of the stone had made a cut several inches long. It was bleeding pretty freely, but he didn’t think it had gone deep enough to hit an artery. If it stopped bleeding of its own accord, well and good. If not, he was in for trouble.
Finding out one thing, though, took precedence over that cut: the nature of the barrier.
He went forward to it again, this time groping with his hands before him. Holding one hand against it, he tossed a handful of sand at it with the other hand. The sand went right through; his hand didn’t.
Organic matter versus inorganic? No, because the dead lizard had gone through it, and a lizard, alive or dead, was certainly organic. Plant life? He broke off a twig and poked it at the barrier. The twig went through, with no resistance, but when his fingers gripping the twig came to the barrier, they were stopped.
He couldn’t get through it, nor could the Roller. But rocks and sand and a dead lizard.... How about a live lizard?
He went hunting under bushes until he found one, and caught it. He tossed it against the barrier and it bounced back and scurried away across the blue sand.
That gave him the answer, so far as he could determine it now. The screen was a barrier to living things. Dead or inorganic matter could cross it.
With that off his mind, Carson looked at his injured leg again. The bleeding was lessening, which meant he wouldn’t need to worry about~ making a tourniquet. But he should find some water, if any was available, to clean the wound.
Water — the thought of it made him realize that he was getting awfully thirsty. He’d have to find water, in case this contest turned out to be a protracted one.
Limping slightly now, he started off to make a circuit of his half of the arena. Guiding himself with one hand along the barrier, he walked to his right until he came to the curving sidewall. It was visible, a dull blue-grey at close range, and the surface of it felt just like the central barrier.
He experimented by tossing a handful of sand at it, and the sand reached the wall and disappeared as it went through. The hemispherical shell was a force-field, too, but an opaque one, instead of transparent like the barrier.
He followed it round until he came back to the barrier, and walked back along the barrier to the point from which he’d started.
No sign of water.
Worried now, he started a series of zigzags back and forth between the barrier and the wall, covering the intervening space thoroughly.
No water. Blue sand, blue bushes, and intolerable heat. Nothing else.
It must be his imagination, he told himself that he was suffering that much from thirst. How long had he been there? Of course, no time at all, according to his own space-time frame. The Entity had told him time stood still out there, while he was here. But his body processes went on here, just the same. According to his body’s reckoning, how long had he been here? Three or four hours, perhaps. Certainly not long enough to be suffering from thirst.
Yet he was suffering from it; his throat was dry and parched. Probably the intense heat was the cause. It was hot, a hundred and thirty Fahrenheit, at a guess. A dry, still heat without the slightest movement of air.
He was limping rather badly and utterly fagged when he finished the futile exploration of his domain.
He stared across at the motionless Roller and hoped it was as miserable as he was. The Entity had said the conditions here were equally unfamiliar and uncomfortable for both of them. Maybe the Roller came from a planet where two-hundred-degree heat was the norm; maybe it was freezing while he was roasting. Maybe the air was as much too thick for it as it was too thin for him. For the exertion of his explorations had left him panting. The atmosphere here, he realized, was not much thicker than on Mars.
No water. That meant a deadline, for him at any rate. Unless he could find a way to cross that barrier or to kill his enemy from this side of it, thirst would kill him eventually.
It gave him a feeling of desperate urgency, but he made himself sit down a moment to rest, to think.
What was there to do? Nothing, and yet so many things. The several varieties of bushes, for example; they didn’t look promising, but he’d have to examine them for possibilities. And his leg — he’d have to do something about that, even without water to clean it; gather ammunition in the form of rocks; find a rock that would make a good knife.
His leg hurt rather badly now, and he decided that came first. One type of bush had leaves — or things rather similar to leaves. He pulled off a handful of them and decided, after examination, to take a chance on them. He used them to clean off the sand and dirt and caked blood, then made a pad of fresh leaves and tied it over the wound with tendrils from the same bush.
The tendrils proved unexpectedly tough and strong. They were slender and pliable, yet he couldn’t break them at all, and had to saw them off the bush with the sharp edge of blue flint. Some of the thicker ones were over a foot long, and he filed away in his memory, for future reference, the fact that a bunch of the thick ones, tied together, would make a pretty serviceable rope. Maybe he’d be able to think of a use for rope.
Next, he made himself a knife. The blue flint did chip. From a foot-long splinter of it, he fashioned himself a crude but lethal weapon. And of tendrils from the bush, he made himself a rope-belt through which he could thrust the flint knife, to keep it with him all the time and yet have his hands free.
He went back to studying the bushes. There were three other types. One was leafless, dry, brittle, rather like a dried tumbleweed. Another was of soft, crumbly wood, almost like punk. It looked and felt as though it would make excellent tinder for a fire. The third type was the most nearly woodlike. It had fragile leaves that wilted at the touch, but the stalks, although short, were straight and strong.
It was horribly, unbearably hot.
He limped up to the barrier, felt to make sure that it was still there. It was. He stood watching the Roller for a while; it was keeping a safe distance from the barrier, out of effective stone-throwing range. It was moving around back there, doing something. He couldn’t tell what it was doing.