And that night's sleep was as a moment. He opened his eyes to see the crags and towers and peaks and domes, and the lofty walls of that vast, broken chaos of canyons across the river. They were now emerging from the misty gray of dawn, growing pink and lilac and purple under the rising sun. He arose and set about his few tasks, which, being soon finished, allowed him an early start. Wildfire had grazed along no more than a mile in the lead. Slone looked eagerly up the narrowing canyon, but he was not rewarded by a sight of the stallion. As he progressed up a gradually ascending trail he became aware of the fact that the notch he had long looked up to was where the great red walls closed in and almost met. And the trail zigzagged up this narrow vent, so steep that only a few steps could be taken without rest. Slone toiled up for an hour--an age--till he was wet, burning, choked, with a great weight on his chest. Yet still he was only half-way up that awful break between the walls. Sometimes he could have tossed a stone down upon a part of the trail, only a few rods below, yet many, many weary steps of actual toil. As he got farther up the notch widened. What had been scarcely visible from the valley below was now colossal in actual dimensions. The trail was like a twisted mile of thread between two bulging mountain walls leaning their ledges and fronts over this tilted pass. Slone rested often. Nagger appreciated this and heaved gratefully at every halt. In this monotonous toil Slone forgot the zest of his pursuit. And when Nagger suddenly snorted in fright Slone was not prepared for what he saw. Above him ran a low, red wall, around which evidently the trail led. At the curve, which was a promontory, scarcely a hundred feet in an airline above him, he saw something red moving, bobbing, coming out into view. It was a horse. Wildfire--no farther away than the length of three lassoes! There he stood looking down. He fulfilled all of Slone's dreams. Only he was bigger. But he was so magnificently proportioned that he did not seem heavy. His coat was shaggy and red. It was not glossy. The color was what made him shine. His mane was like a crest, mounting, then failing low. Slone had never seen so much muscle on a horse. Yet his outline was graceful, beautiful. The head was indeed that of the wildest of all wild creatures--a stallion born wild--and it was beautiful, savage, splendid, everything but noble. Whatever Wildfire was, he was a devil, a murderer--he had no noble attributes. Slone thought that if a horse could express hate, surely Wildfire did then. It was certain that he did express curiosity and fury. Slone shook a gantleted fist at the stallion, as if the horse were human. That was a natural action for a rider of his kind. Wildfire turned away, showed bright against the dark background, and then disappeared. CHAPTER VI That was the last Slone saw of Wildfire for three days.