And, having spread the blanket out in the dark-ness, he rubbed his hands over its velvety surface, admiring its wonderful texture. The texture is such that water can be carried in these Apache blankets with as much certainty as in a metal vessel. But Fred protested against both lying down to sleep at the same time. He thought it likely that the Apaches meant to visit the cave during the night; but his friend laughed his fears to scorn, assuring him that there could be no danger at all. In view of the reception tendered the blanket, the Apaches would take it for granted that the parties beneath were too vigilant to permit anyone to steal a march upon them. Mickey at once attested his sincerity by stretching out upon the inviting couch, and Fred concluded at last to join him. It was not long before the Irishman was sound asleep, but the lad lay awake a long time, looking reflectively up at the spot where he knew the opening to be,--the opening which had been the means of letting himself and comrade down into that dismal retreat of solitude,--and wondering what their enemies were doing. “They must know that I am here. Lone Wolf will punish them if they don't keep me, so I am sure they will do all they can to catch me again. I wish I was certain that there was no way of getting in but through that up there, and then I could sleep too, but I feel too scared to do it now.” This anxiety kept him awake a long time after Mickey became unconscious; but, as hour after hour passed and the stillness remained unbroken, his fears were gradually dissipated and a feeling of drowsiness began stealing over him. Before consciousness entirely departed, he turned upon his side, that being the posture he generally assumed when asleep. As he made the movement and his ear was placed against the blanket, which in its turn rested upon the ground, he heard something which aroused his suspicions instantly and he raised his head. But when he rested on his hands, with his shoulders thrown up, he could hear nothing at all. The earth was a better conductor of sound than the atmosphere, which accounted for what at first seemed curious. The boy applied his ear as before, and again he heard the noise, faintly, but distinctly; As the eye was of no use, he pressed his head against the blanket and listened. Several minutes were occupied in this manner, and then he said, in an undertone: “I know what it is!--it is somebody walking as softly as he can. There is another way of getting into this cavern, and those Apaches have found it out. They've got inside and are hunting for us!” CHAPTER XXXIII. WHAT THE FOOTSTEPS MEANT Careful listening convinced Fred that there were two red-skins groping around in the darkness. After making himself certain on that point, he reached his hand over, and, grasping the muscular arm of Mickey O'Rooney, shook his companion quite vigorously.