In the afternoon he and I left the party in search of an antelope; until at the distance of a mile or two on the right, the tall white wagons and the little black specks of horsemen were just visible, so slowly advancing that they seemed motionless; and far on the left rose the broken line of scorched, desolate sand-hills. The vast plain waved with tall rank grass that swept our horses' bellies; it swayed to and fro in billows with the light breeze, and far and near antelope and wolves were moving through it, the hairy backs of the latter alternately appearing and disappearing as they bounded awkwardly along: while the antelope, with the simple curiosity peculiar to them, would often approach us closely, their little horns and white throats just visible above the grass tops, as they gazed eagerly at us with their round black eyes. I dismounted, and amused myself with firing at the wolves. Henry attentively scrutinized the surrounding landscape; at length he gave a shout, and called on me to mount again, pointing in the direction of the sand-hills. A mile and a half from us, two minute black specks slowly traversed the face of one of the bare glaring declivities, and disappeared behind the summit. "Let us go!" cried Henry, belaboring the sides of Five Hundred Dollar; and I following in his wake, we galloped rapidly through the rank grass toward the base of the hills. From one of their openings descended a deep ravine, widening as it issued on the prairie. We entered it, and galloping up, in a moment were surrounded by the bleak sand-hills. Half of their steep sides were bare; the rest were scantily clothed with clumps of grass, and various uncouth plants, conspicuous among which appeared the reptile-like prickly pear. They were gashed with numberless ravines; and as the sky had suddenly darkened, and a cold gusty wind arisen, the strange shrubs and the dreary hills looked doubly wild and desolate. But Henry's face was all eagerness. He tore off a little hair from the piece of buffalo robe under his saddle, and threw it up to show the course of the wind. It blew directly before us. The game were therefore to windward, and it was necessary to make our best speed to get around them.