Intense excitement was manifested not only by the spectators but by our chosen representatives while the trio belted their waists, tightened their saddle girths, examined their firearms, discarded their waistcoats, slung aside their hats, and otherwise prepared for the coming encounter--in all of which they received willing assistance. At the last moment Dan Trippe, the Nestor of our group on all such occasions, stood beside his wagon with uncovered head and in an earnest manner from his unfailing knowledge gave the boys some parting words of advice and admonition. He briefly instructed them in the habits of the American Bison, (_Bos Americanus_) its mode of defense and its sudden attacks. He carefully informed them in what part of the body the leaden missile would be most likely to prove effective and where it would strike as harmlessly as a feather. Thus duly prepared for the chase, the boys, as had been arranged, rode rapidly round the valley to the right. Captain Alsop turned to the left and soon disappeared from sight. The plan agreed upon was to out-flank the buffalo from both sides and start the chase toward the train. Nothing could have been planned to produce a more spectacular contest. The affair was to occur in a magnificent natural amphitheater the floor of which was comparatively level, and the spectators occupied a remarkably favorable position upon the elevated ridge at one end of the ellipse, commanding a fine view of the entire field. Stretched along in the distance at our right were the snow-clad peaks of the Wind River Range. In scenic effect it was hardly inferior to the site of the amphitheater in Taormina, where Mount Etna at the south and the Snow Mountains across the straits of Messina once added to the interest of the sports in the arena. All agreed that such opportunities were very uncommon. In about thirty minutes nearly every watcher at the same moment observed the boys emerging from a ravine along which they had entered the valley and about one-third of a mile beyond their game. Every spectator was as intent on witnessing what was to follow as if in the ring at a bull fight in Old Madrid. At the same moment the buffalo also caught his first glimpse of his pursuers. Then followed a demonstration which some of the older hunters declared that they had never before witnessed. The animal, which proved to be an unusually large bull buffalo, turned toward the horsemen and as if in defiance gave an angry shake of his massive head; then dropping upon the ground rolled entirely over three times as if to warm himself to the approaching combat, and all as nimbly as would a kitten and with a celerity of movement marvelous in so large an animal. With one angry bellow he started toward the hills. At that moment Captain Alsop rode rapidly into the arena and would soon have met the bull but the animal instantly turned directly toward the train and the chase was on. For