Pursuing the shelf, the hound contentedly at heel and occasionally sniffing his calves, Torres found that the narrow track, paralleling the river, after an ascent descended to it again. And then Torres saw two things, one that made him pause and shudder, and one that made his heart beat high with hope. The first was the underground river. Rushing straight at the wall of rock, it plunged into it in a chaos of foam and turbulence, with stiffly serrated and spitefully spitting waves that advertised its swiftness and momentum. The second was an opening to one side, through which streamed white daylight. Possibly fifteen feet in diameter was this opening, but across it was stretched a spider web more monstrous than any product of a madman’s fancy. Most ominous of all was the debris of bones that lay beneath. The threads of the web were of silver and of the thickness of a lead pencil. He shuddered as he touched a thread with his hand. It clung to his flesh like glue, and only by an effort that agitated the entire web did he succeed in freeing his hand. Upon his clothes and upon the coat of the dog he rubbed off the stickiness from his skin. Between two of the lower guys of the great web he saw that there was space for him to crawl through the opening to the day; but, ere he attempted it, caution led him to test the opening by helping and shoving the hound ahead of him. The white beast crawled and scrambled out of sight, and Torres was about to follow when it returned. Such was the panic haste of its return that it collided with him and both fell. But the man managed to save himself by clinging with his hands to the rocks, while the four-footed brute, not able so to check itself, fell into the churning water. Even as Torres reached a hand out to try to save it, the dog was carried under the rock. Long Torres debated. That farther subterranean plunge of the river was dreadful to contemplate. Above was the open way to the day, and the life of him yearned towards the day as a bee or a flower toward the sun. Yet what had the hound encountered to drive it back in such precipitate retreat? As he pondered, he became aware that his hand was resting on a rounded surface. He picked the object up, and gazed into the eyeless, noseless features of a human skull. His frightened glances played over the carpet of bones, and, beyond all doubt, he made out the ribs and spinal columns and thigh bones of what had once been men. This inclined him toward the water as the way out, but at sight of the foaming madness of it plunging through solid rock he recoiled. Drawing the Queen’s dagger, he crawled up between the web-guys with infinite carefulness, saw what the hound had seen, and came back in such vertigo of retreat that he, too, fell into the water, and, with but time to fill his lungs with air, was drawn into the opening and into darkness. * * * * *