He pressed closer against the bowlder which sheltered him and searched the surroundings again, slowly, painstakingly. Then there came a low rustling sound, as though a body were being dragged across dried grass. It was to his left and not far away. If it is possible to endow one sense with the total strength of all the others, then his ears were so endowed. Whether or not they were strengthened to an unusual degree they nevertheless heard the rubbing of soft leather on the bowlder he lay against, and he held his breath as he reversed his grip on the Colt. "Hoppy, or Trask?" he wondered, glad that his head did not project beyond the rock. A quick glance at the milling Kane showed no change in that person's antics and he felt certain that he had not been detected by the boss. He froze tighter if it is possible to improve on perfection, for his ears caught a renewal of the sounds. Then his eyes detected a slow movement and focussed on a shadowy hand which fairly seemed to ooze out beyond the rock. When he discerned a ring on one of the fingers he knew it was not Hopalong, for his friend wore no ring. That being so, it only could be Trask who was creeping along the other side of the rock. Johnny glanced again at the peripatetic gang leader and back to the creeping hand, and wondered how high in the air its owner would jump if it were suddenly grabbed. Then he mentally cursed himself, for his independent imagination threatened to make him laugh. He could feel the tickle of mirth slyly pervading him and he bit his lip with an earnestness which cut short the mirth. The hand stopped and the heel of it went down tightly against the earth as though bearing a gradual strain. Johnny was reassured again, for Trask never would be stalking Kane if he had the slightest suspicion that enemies, or strangers, were in the valley, and he hazarded another glance at Kane. The mechanical walker was drawing near the rock again and in a few steps more would turn his back to it and start away. By this time Johnny had solved the riddle, for although such a thing was beyond any experience of his, his wild guess began to be accepted by him: Kane was walking in his sleep. Where was Hopalong? He hoped his friend would not try to capture the boss until he, himself, had taken care of Trask. This must be his first duty, and knowing what Trask would do very shortly he prepared to do it.