He drifted on down the trail, which wound around huge fragments of rock riven from the cliffs in prehistoric days. He was awed by the immensity of the chasm and talked continuously to his horse which shuffled along behind paying careful attention to the footing. Arrived at the stream the horse drank. Sundown mounted and rode along the narrow level paralleling the river course. The canon widened, and before he realized it he was in a narrow valley carpeted with bunch-grass and dotted with solitary cypress and infrequent clumps of pine. He paused to inspect a small mound of rock which was partially surrounded by a wall of neatly laid stone. Within the semicircular wall was a hole in the ground--the entrance to a cave. Farther along he came upon the ruins of a walled square, unmistakably of human construction. He became interested, and, tying his horse to a scrub-cedar, began to dig among the loose stones covering the interior of the square. He discovered a fragment of painted pottery--the segment of an olla, smooth, dark red, and decorated with a design in black. He rubbed the earth from the fragment and polished it on his overalls. He unearthed a larger fragment and found that it matched the other piece. He was happy. He forgot his surroundings, and scratched and dug in the ruin until he accumulated quite a little pile of shards, oddly marked and colored. Eventually he gathered up his spoils and tied them in his handkerchief. Leaving his horse, he meandered down the valley until he came to another and larger cave. "Wonder what's down there?" he soliloquized. "Mebby one of them Injuns. Been there a thousand years waitin' for somethin' to turn up. 'Nough to make a fella tired, waitin' that long." He wanted to explore the cave, but he was afraid. Moreover, the interior was dark. He pondered. Finally his natural fondness for mild adventure overcame his fear. "Got some matches!" he exclaimed, joyfully. "Wonder if it's deep? Guess I could put me legs in first, and if nothin' bites me legs, why, I could follow 'em down to bottom." He put his head in the hole. "Hey!" he hallooed, "are you in there?" He rose to his feet. "Nothin' doin'. Well, here goes. I sure want to see what's down there." In his excitement he overlooked the possibility of disturbing a torpid rattler. He slid feet first into the cave, found that he could all but stand upright, and struck a match.