He ate and drank sitting on the limb with his back to the trunk. He kept no special lookout, rationalizing that night feeders would be bedded down and day feeders would hardly be prowling the tree tops-not big ones, anyway; they would be on the ground, stalking herbivores. The truth was that his green hide-away looked too peaceful to be dangerous.

He continued to sit after he finished eating, considered drinking more of his precious water, even considered crawling back into his hammock. Despite the longest night he had ever had he was bone tired and the day was already hot and sleepy and humid; why not stretch out? His only purpose was to survive; how better than by sleeping and thereby saving food and water?

He might have done so had he known what time it was. His watch told him that it was five minutes before twelve, but he could not make up his mind whether that was noon on Sunday or midnight coming into Monday. He was sure that this planet spun much more slowly than did Mother Earth; the night before had been at least as long as a full Earth day.

Therefore the test had been going on at least twentysix hours and possibly thirty-eight- and recall could be any time after forty-eight hours. Why, it might be today, before sunset, and here he was in fine shape, still alive, still with food and water he could trust.

He felt good about it. What did a stobor have that a man did not have more of and better? Aside from a loud voice, he added.

But the exit gate might be as much as twenty kilometers "east" of where he had come in; therefore it behooved him to reach quickly a point ten kilometers east of where he had come in; he would lay money that that would land him within a kilometer or two of the exit. Move along, hole up, and wait- why, he might sleep at home tonight, after a hot bath!

He started unlashing his hammock while reminding himself that he must keep track of hours between sunrise and sunset today in order to estimate the length of the local day. Then he thought no more about it as he had trouble folding the hammock. It had to be packed carefully to fit into a pocket of his vest pack. The filmy stuff should have been spread on a table, but where he was the largest, flattest area was the palm of his hand.

But he got it done, lumpy but packed, and started down. He paused on the lowest branch, looked around. The oversized and hungry thing that had chased him up the tree did not seem to be around, but the undergrowth was too dense for him to be sure. He made a note that he must, all day long and every day, keep a climbable tree in mind not too far away; a few seconds woolgathering might use up his luck.

Okay, now for orientation- Let's see, there was the tree he had used to mark "east." Or was it? Could it be that one over there? He realized that he did not know and swore at himself for not checking it by compass. The truth was that he had forgotten that he was carrying a compass. He got it out now, but it told him nothing,

Since east by compass bore no necessary relation to direction of sunrise on this planet. The rays of the primary did not penetrate where he was; the forest was bathed by a dim religious light unmarked by shadows.

Well, the clearing could not be far away. He would just have to check. He descended by climbing spurs, dropped to spongy ground, and headed the way it should be. He counted his paces while keeping an eye peeled for hostiles.

One hundred paces later he turned back, retracing his own spoor. He found "his" tree; this time he examined it. There was where he had come down; he could see his prints. Which side had he gone up? There should be spur marks.

He found them... and was amazed at his own feat; they started high as his head. "I must have hit that trunk like a cat!" But it showed the direction from which he had come; five minutes later he was at the edge of the open country he had crossed the day before.

The sun made shadows here, which straightened him out and he checked by compass. By luck, east was "east" and he need only follow his compass. It took him back into the forest.

He traveled standing up. The belly sneak which he had used the day before was not needed here; he depended on moving noiselessly, using cover, and keeping an eye out behind as well as in front. He zigzagged in order to stay close to trees neither too big ilor too small but corrected his course frequently by compass.

One part of his mind counted paces. At fifteen hundred broken-country steps to a kilometer Rod figured that fifteen thousand should bring him to his best-guess location for the exit gate, where he planned to set up housekeeping until recall.

But, even with part of his mind counting paces and watching a compass and a much larger part watching for carnivores, snakes, and other hazards, Rod still could enjoy the day and place. He was over his jitters of the night before, feeling good and rather cocky. Even though he tried to be fully alert, the place did not feel dangerous now-stobor or no stobor.

It was, he decided, jungle of semi-rainforest type, not dense enough to require chopping one's way. It was interlaced with game paths but he avoided these on the assumption that carnivores might lie waiting for lunch to come down the path-Rod had no wish to volunteer.

The place seemed thick with game, mostly of antelope type in many sizes and shapes. They were hard to spot; they faded into the bush with natural camouflage, but the glimpses he got convinced him that they were plentiful. He avoided them as he was not hunting and was aware that even a vegetarian could be dangerous with hooves and horns in self or herd defense.

The world above was inhabited, too, with birds and climbers. He spotted families of what looked like monkeys and speculated that this world would probably have developed its own race of humanoids. He wondered again what planet it was? Terrestrial to several decimal places it certainly seemed to be-except for the inconveniently long day- and probably one just opened, or it would be swarming with colonists. It would be a premium planet certainly; that clearing he had come through yesterday would make good farm land once it was burned off. Maybe he would come back some day and help clean out the stobor.

In the meantime he watched where he put his hands and feet, never walked under a low branch without checking it, and tried to make his eyes and ears as efficient as a rabbit's. He understood now what his sister had meant about how being unarmed makes a person careful, and realized also how little chance he would have to use a gun if he let himself be surprised.

It was this hyperacuteness that made him decide that he was being stalked.

At first it was just uneasiness, then it became a conviction. Several times he waited by a tree, stood frozen and listened; twice he did a sneak through bushes and doubled back on his tracks. But whatever it was seemed as good as he was at silent movement and taking cover and (he had to admit) a notch better.

He thought about taking to the trees and outwaiting it. But his wish to reach his objective outweighed his caution; he convinced himself that he would be safer if he pushed on. He continued to pay special attention to his rear, but after a while he decided that he was no longer being followed.

When he had covered, by his estimate, four kilometers, he began to smell water. He came to a ravine which sliced across his route. Game tracks led him to think it might lead down to a watering place, just the sort of danger area he wished to avoid, so Rod crossed quickly and went down the shoulder of the ravine instead. It led to a bank overlooking water; he could hear the stream before he reached it.

He took to the bushes and moved on his belly to a point where he could peer out from cover. He was about ten meters higher than the water. The ground dropped off on his right as well as in front; there the ravine joined the stream and an eddy pool formed the watering place he had expected. No animals were in sight but there was plenty of sign; a mud flat was chewed with hoof marks.