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 round them. We scrambled from this ravine, and galloping away through the hollows, soon found another, winding like a snake among the hills, and so deep that it completely concealed us. We rode up the bottom of it, glancing through the shrubbery at its edge, till Henry abruptly jerked his rein and slid out of his saddle. Full a quarter of a mile distant, on the outline of the farthest hill, a long procession of buffalo were walking, in Indian file, with the utmost gravity and deliberation; then more appeared, clambering from a hollow not far off, and ascending, one behind the other, the grassy slope of another hill; then a shaggy head and a pair of short, broken horns appeared, issuing out of a ravine close at hand, and with a slow, stately step, one by one, the enormous brutes came into view, taking their way across the valley, wholly unconscious of an enemy. In a moment Henry was worming his way, lying flat on the ground, through grass and prickly-pears, toward his unsuspecting victims. He had with him both my rifle and his own. He was soon out of sight, and still the buffalo kept issuing into the valley. For a long time all was silent; I sat holding his horse, and wondering what he was about, when suddenly, in rapid succession, came the sharp reports of the two rifles, and the whole line of buffalo, quickening their pace into a clumsy trot, gradually disappeared over the ridge of the hill. Henry rose to his feet, and stood looking after them. “You have missed them,” said I. “Yes,” said Henry; “let us go.” He descended into the ravine, loaded the rifles, and mounted his horse.