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.
III
That was the last Slone saw of Wildfire for three days.
It took all of this day to climb out of the cañon. The second was a slow march of thirty miles into a scrub cedar and piñon forest, through which the great red and yellow walls of the cañon could be seen. That night Slone found a water hole in a rocky pocket and a little grass for Nagger. The third day's travel consisted of forty miles or more through level pine forest, dry and odorous, but lacking the freshness and beauty of the forest on the north side of the cañon. On this south side a strange feature was that all the water, when there was any, ran away from the rim. Slone camped this night at a muddy pond in the woods, where Wildfire's tracks showed plainly.
On the following day Slone rode out of the forest into a country of scanty cedars, bleached and stunted, and out of this to the edge of a plateau, from which the shimmering desert flung its vast and desolate distances, forbidding and menacing. This was not the desert upland country of Utah, but a naked and bony world of colored rock and sand—a painted desert of heat and wind and flying sand and waterless wastes and barren ranges. But it did not daunt Slone. For far down on the bare, billowing ridges moved a red speck, at a snail's pace, a slowly moving dot of color which was Wildfire.
On open ground like this, Nagger, carrying two hundred and fifty pounds, showed his wonderful quality. He did not mind the heat nor the sand nor the glare nor the distance nor his burden. He did not tire. He was an engine of tremendous power.
Slone gained upon Wildfire, and toward evening of that day he reached to within half a mile of the stallion. And he chose to keep that far behind. That night he camped where there was dry grass, but no water.
Next day he followed Wildfire down and down, over the endless swell of rolling red ridges, bare of all but bleached white grass and meager greasewood, always descending in the face of that painted desert of bold and ragged steppes. Slone made fifty miles that day, and gained the valley bed, where a slender stream ran thin and spread over a wide sandy bottom. It was salty water, but it was welcome to both man and beast.
The following day he crossed, and the tracks of Wildfire were still wet on the sand bars. The stallion was slowing down. Slone saw him, limping along, not far in advance. There was a ten-mile stretch of level ground, blown hard as rock, from which the sustenance had been bleached, for not a spear of grass grew there. And following that was a tortuous passage through a weird region of clay dunes, blue and violet and heliotrope and lavender, all worn smooth by rain and wind. Wildfire favored the soft ground now. He had deviated from his straight course. And he was partial to washes and dips in the earth where water might have lodged. And he was not now scornful of a green-scummed water hole with its white margin of alkali. That night Slone made camp with Wildfire in plain sight. The stallion stopped when his pursuers stopped. And he began to graze on the same stretch with Nagger. How strange this seemed to Slone!