They hastened on now with their eyes fixed on the tree. A minute later an exclamation broke from Dave, who was ahead, and the others on joining him saw that the great wall of rock had been split as if by an earthquake. The opening was not more than ten yards wide, and on looking up a narrow line of sky appeared between the walls of rock. Looking the other way, they saw that the tree on the hill bore exactly on the middle peak, the Indian village lying just in the same line halfway up the hill.

"Here is the place, sure enough," Dave said; "there can't be no mistake about it; it is just as the map made it, the tree on the middle peak and the line from them going right into this Canyon. Look, boys, there is a stream comes down here in the wet season, and runs into the one in the middle of the valley. See, I can make out gold sparkling in the sand; that is how it was the place was found; they were prospecting along the valley, and they came upon gold, and traced it up to the mouth of this Canyon."

"Shall we go in now, Dave?" Dick asked excitedly, for they were still standing among the rocks, which broke off abruptly opposite the mouth of the Canyon, those in front of it evidently having been swept away by the torrents flowing down it.

"No, don't go a step forward, Dick. Don't let us risk nothing by showing ourselves now. We will make our way back as we came to Boston, and bring up the horses after dark. We have not got a chance to throw away, I can tell you."

At night they returned with the horses; two blankets had been cut up, and the feet of the animals muffled.

"If one of them redskins was to come upon our track and saw the print of a horseshoe, it would be all up with us," Zeke said; "we had best do the same ourselves; the heel of boot would be as ugly a mark as a horseshoe. We must keep well along at the edge of these fallen rocks. Like enough they come down here to fetch water up to their village, and the further we keep away from the stream the better."

The moon was half full, which was fortunate, as they would otherwise have had great difficulty in finding the narrow gap in the cliff. Its light, too, enabled them to avoid rocks that had rolled out farther than the rest; once inside the gorge it was pitch-dark, and they had to feel their way along.

In about a hundred yards it began to widen, and they soon found themselves in a narrow valley with perpendicular sides, which seemed to widen farther up. The horses, were at once unloaded.

"Now do you lie down," Dave said. "I will keep watch at the mouth. I don't think there is any danger; still, we may as well begin as we shall have to go on."

"Well, call me up in a couple of hours, then," Zeke said; "it will begin to get light in about four, and as soon a............