"He has gone off to make some investigations between now and morning. I am glad of it, for he may learn something which he desires to know, and which he would never find out by staying here. I wish I could have gone with him, but no doubt he will do better alone." It was demonstrated, therefore, that the guide had violated the very rule which he had impressed more than once upon his young friends, for he had left Jack Dudley sound asleep, as he believed, without any one standing sentinel over him. But it was because the circumstances were so exceptional and extraordinary that it justified such suspension of the rules. Jack did not hesitate to make himself as comfortable as the situation would permit. He folded his blanket on the ground, and sat with his back against the very rock where he had fallen asleep the night before. "No danger of my doing it again," he reflected; "and it wouldn't make any difference if I did, since Hank believes I am dreaming." Jack supposed he threw the wood on the flame to keep away the possible danger from wild animals that might be prowling in the neighborhood; though, because of the reasons named, there was little to be apprehended from them. The youth was so alive to the situation that he heard a cough from one of the ponies lying on the ground near the further side of the plateau, and beyond sight. Twice the watcher fancied he detected a shadowy figure stealing here and there in the gloom, and he grasped his rifle, ready for instant use; but it must have been a mistake on his part, for nothing materialized, and, curious as it may seem, he finally sank into a fitful slumber, which lasted a long time without interruption. CHAPTER XV. TOZER. Meanwhile Hank Hazletine was busy. He had formed several theories to account for the disappearance of the youth, of whom he had grown extremely fond, brief as was their acquaintance, but the data upon which he based these theories were so vague and meagre that he could do nothing until more definite knowledge was obtained. When first talking with Jack Dudley, the hunter expected to retain his place near the cavern until morning, for it would seem that there was little hope of doing anything until the sun shone, but reflection convinced him that there was a possibility of accomplishing something during the long interval that must intervene. Still it is not probable he would have made the attempt had not something invited it. Standing in the gloom on the outside of the cavern, he saw a point of light against the side of the nearest mountain peak, less than half a mile distant. It could not be a star, for his familiarity with the country told him the background must prevent an orb showing at that height above the horizon. It came from a fire burning at the place, and that fire had been kindled by Indians.