In an instant the main body caught the alarm.The buffalo began to crowd away from the point toward which we were approaching, and a gap was opened in the side of the herd.We entered it, still restraining our excited horses.Every instant the tumult was thickening.The buffalo, pressing together in large bodies, crowded away from us on every hand.In front and on either side we could see dark columns and masses, half hidden by clouds of dust, rushing along in terror and confusion, and hear the tramp and clattering of ten thousand hoofs.That countless multitude of powerful brutes, ignorant of their own strength, were flying in a panic from the approach of two feeble horsemen.To remain quiet longer was impossible.