But he hung on. Playing the flashlight below him, he saw that the floor of the crevice was still many yards away. It seemed to be of sand, but he was not sure. Limestone could be deceiving. Putting the light back in his belt, he began feeling along the wall. It was smooth. Finally, reaching down as far as he could, he found a little hole scarcely large enough for one hand. There was no time left to consider. Getting his fingers into it he turned loose of the rope and dropped down. It felt as though his left shoulder was tearing loose, but he held his grip. Kicking about he found a toe-hold in the wall--and finally another grip for his hand. In this way, Odin went down for nearly a dozen yards. But at last he could find neither a grip for his hands nor a rest for his feet. He did not care now. The pain in his shoulders was becoming unbearable. Taking one great gulp of air, he released his hold on the wall and thrust his body out into space. The little light in his cap went out. Odin fell through darkness. He fell into soft sand, doubling up as his feet touched it. Odin rolled over and over, losing both flashlight and gun as he tumbled. Then he came up against hard rock, with most of the wind knocked out of him, and lay there gasping, feeling about him with frantic hands for the light and the gun. * * * * * The old terror of the dark swept over him as he clutched this way and that and found nothing. Then he got a grip on himself and laughed at his fears--remembering that he had matches in his pockets. The spurt of a match showed him his miner's cap not five feet away. He must have missed it by inches as he was clutching about in the dark. He lit it and soon found gun and flash. Pointing his light upward, he could faintly see the knotted end of his rope swinging back and forth up there against the precipice. It was his only link with the outside world, and it was far out of reach. He shrugged and played the light about the cavern into which he had ventured. The walls of the crevice into which he had fallen were never over ten feet apart and in spots were less than three. But the sandy bed sloped noticeably downward, so downward he went. Only pausing occasionally to take a mouthful of water from his canteen or eat a bite or two. His watch had been broken in that last fall. He threw it away. The air grew hotter. So hot at last that Odin had to pause more often and rest upon the sand. But it too was hot, as though it had never known anything but this one temperature. Stumbling along, his nostrils and chest burning, and something thumping in his ears, he finally fell to his knees. Jack Odin lay there for a long time. But the floor of the cavern still led downward. So, with nothing else left in his mind, he got to his knees and crawled on.