By now, he was convinced that he was in Zazel's World. Though the Thoan legends were sketchy in their descriptions of it, they certainly sounded like the tunnel he was in. Jubilation at having done what Red Orc had found impossible to accomplish spurred him on. He'd show the bastard.

Near the beginning of the sixth hour of his walk, he came to a fork. A tunnel opening was on his left, and one was on his right. Without hesitation, he took the left one. He regarded the left as lucky-to hell with the superstitions concerning sinistrality-and he was betting that the chosen avenue would lead him to the heart of this planetary cavern. He found evidence for this when he came across the first of many animal skeletons. They strewed his path as he stepped past or over them. Some seemed to have died while locked in combat, so intertangled were their bones. Alarmed, he started to jog. Something bad had happened.

A few minutes later, he stepped over bones and through the tunnel exit into a gigantic cave. It was lit by the knobs, which were much more closely placed than those in the tunnels. But their illumination did not enable him to see very far into the cave.

He walked down a slope and onto the flat stone floor. Here, as in the tunnel, lay the bones of many different kinds of animals and birds. The plants once growing here had been eaten down to the soil on the stone floor. However, enough fronds and fragments were left for him to identify them as of vegetable origin. He supposed that the animals had devoured the dead or dying plants. But they had killed each other off before all the plant remnants could be eaten.

On the wall nearest him, the symbols moved in their arcane parade as far as he could see.

According to what he had heard, the entire world was a colossal computer. But Zazel had made fauna and flora to decorate his large caves and to amuse himself. They and the computer had failed to preserve his desire to live, and he had committed suicide.

Where was the operator of this place, the sole sentient, the lonely king, the artificial being whom Zazel had left to watch over this dismal universe?

Kickaha called out several times to alert Dingsteth if he should be within hearing range. His voice echoed, and no one answered him. He shrugged and set out for the other end of the cavern. When he looked back, he could not see the entrance. The shadows had taken it. After another hour, he came to the end of the vast hollow and was confronted by six tunnel openings. He took the one on the extreme left. After thirty-five minutes, he came to another. The same spectacle as in the previous place was before him. The bones and shreds of plants lay together in the silence.

But the train of symbols still moved along the walls and disappeared into the darkness ahead. The computer was still alive. Rather, it was still working.

Nowhere had he seen any controls or displays. To operate the computer, he figured, you had to speak to it. He did not have the slightest knowledge of how to ask it questions, and the strange symbols were unreadable. Probably Zazel had made his own language to operate the machine. That meant that Kickaha's mission was a failure. Worse, he was stuck in this godawful place with only enough food to last him twelve days. If, that is, he ate very lightly.

He thought, if I can find Dingsteth or he finds me, it'll be fine. That is, it'll be okay if he cooperates.

Dingsteth, however, was beyond helping anybody, including himself. Kickaha found what was left of him in a chair carved out of stone. The bones had to be his. They were of a bipedal manlike being, but too different in many respects to be a genuine specimen of Homo sapiens. Among the bones were tiny plastic organs and wires attached to them. The skull, which had fallen into the lap, was definitely not a man's.

I'm very lucky to have found this place so soon after I got here, Kickaha thought. After all, when I came to this world, I was gambling that I'd find Dingsteth. I could have wandered through this maze, which probably goes for thousands of miles throughout this world of stone. But here I am in the place I was looking for. And in a relatively short time, too.

On the other hand, his luck hadn't been so good. The only one who could tell him where the engine data was was no longer talking and never would talk again.

Kickaha could find nothing to reveal how Dingsteth had died. The skull and skeleton bore no obvious marks of violence. Maybe he had become bored with his futile and purposeless life and had taken poison. Or it could be that Zazel had constructed Dingsteth so that he died after a certain span of time. Whatever had killed him, he had left behind a world that was running down.

Kickaha said loudly, "I just don't know!" And then he howled with frustration and rage and seized the skull and hurled it far across the floor. That did not help his predicament any, but it did make him feel a little less angry. His voice and his cry were hurled back at him from the faraway walls. It was as if this world were determined to have the last word.

He was galled by the thought that Dingsteth's death did not mean that the creation-destruction data would never be available to anyone. If Red Orc got here, he might be able to operate the computer. He was a scientist, and he was intelligent enough to figure a way to communicate with the computer. Kickaha certainly could not hang around here until the Thoan arrived, if he ever did.

He smacked his fist, not too hard, against the back of the stone chair. He shouted, "I'm not beaten yet!"

THE SYMBOLS ON THE WALL COULD BE GOING IN A CIRCUIT AND ending up where they had started. But they might be heading toward a control room. He decided to go deeper into the cavern-tunnel complex. A little more than a mile was behind him when he stopped. The light-shedding knobs and lichen here were turning brown. At least half of the knobs had fallen from the ceiling to the floor, and the rest looked as if they would not be able to cling to the ceiling much longer. If this rot spread, all the tunnels and caves would be totally dark, and the plants' oxygen production would cease.

Unable to give up any project easily, he walked onward, marking the wall with an X every hundred feet. The rot had now become almost complete. There was plenty of fresh water, though. No, there was not. Ten minutes later, the stream had quit running. Within five minutes, the groove in the middle of the floor was filmed with water. Even that would soon be gone in the increasing heat.

By now, so many knobs were dead that he could see only five feet in front of him. He stopped again. What was the use of pushing on? This world would soon be dead. Though the characters were still moving along the wall, that meant only that the great computer had not completely died. It would probably keep working as long as its energy supply did not run out. That might be for an unguessable number of millennia.

He turned around and began walking toward the huge cave. To make sure that he was following the right path, he had to stay close to the wall marked with X's. After a few minutes, he was forced to take his flashlight from his backpack. He attached this to his head with a band and walked faster. Then the air became so heavy and oxygenless and his breath so short that he brought the bottle out of the backpack and carried it by a strap over his right shoulder. After putting the mask over his face, he turned on the air. Now and then, though, he would turn it off and slide the mask to one side. He was able to get along without the oxygen for a few minutes before he had to replace the mask and breathe "fresh" air.