One day Dick and Frank had gone out alone, and had been led a long distance from the line of march in pursuit of a herd of deer. These had finally gone up a narrow cañon in the mountains. The hunters pursued them for some distance, and then, despairing of overtaking them, turned their horses, and began to retrace their steps. Suddenly Turk, who was in advance, stopped, uttered a deep growl, and its hair bristled from its head to its tail. "What is it, Turk?" Frank asked. The animal replied with another low, deep growl. "It must be some savage beast," Frank said. "That ain't likely," Dick said; "any beast in this cañon would have moved away when we passed before. I think the dog must scent Injins. A party may have seen us entering the gap, and may be in pursuit." He threw himself off his horse, and listened, with his ear to the ground. "It's Injins, sure enough!" he exclaimed; "I can hear the clattering of horses' hoofs on the hard rock. There's nothing for it but for us to make our way up the cañon." They turned their horses, and galloped forward, Turk, after one more growl in the direction of the Indians, following. Presently the defile divided. "Shall we take the main branch, or the one to the right?" Frank asked. "Better keep straight on," Dick said; "the other may lead into some valley from which there could be no getting out, and we should be caught in a trap. See!" he said, as he halted, "the deer have gone that way. Do you see some of the pebbles have been thrown out of that little stream? "Jump off your horse, and cut some bits off your blankets and tie them round your horse's feet. If the Indians see no marks going forward, they will naturally suppose we have turned off here in pursuit of the deer." Frank did what his comrade suggested; but quickly as the work was performed, they heard the sound of the horsemen in pursuit, loud and distinct, before they again set forward. Then, springing on their horses, they rode up the cañon. After a while they halted; the sounds of pursuit had ceased, and they had no doubt the Indians had turned off into the other ravine. "It all depends how far that runs," Dick said, "how soon they will be in pursuit again. If it comes soon to an end it will not be long before we have them after us; if it goes on for some miles we are safe." Winding between perpendicular cliffs of great height, they rode forward, mounting steadily. It was impossible to make rapid progress, for although in some places the bottom of the ravine was bare, smooth rock, at others it was piled with boulders. It was three hours before they emerged from it, and upon doing so found they were upon an elevated plateau. Before they moved forward, Frank said, "Turk, do you hear them?" The dog stood with ears erect and quivering nostrils, looking down the ravine which they had just left. Presently he gave a low, deep growl.