Unaware how far he was leaving his companion behind him, and ignorant of the direction in which he was moving as he followed the herd, Reuben still maintained the pursuit. He was unaware also of another change in the course of the animals. He had ridden near to the border of the terrified mass, but for some reason had been unable to penetrate it, or to separate one from the others.
As the herd swung to the right, Reuben found that he was being crowded by the animals, that apparently either were unaware of his presence or ignored their peril. He was ignorant of the fact that the herd was passing over dangerous ground. Many times in his long rides across the plains Reuben had passed through a prairie-dog village. The sight of the little creatures sitting erect upon their haunches, watching the approaching stranger on horseback, had become so common that he had given slight heed to the little animals. Nor had he once thought of them as a source of danger.
Still the flight and the pursuit were maintained. Several times the horse which Reuben was riding stumbled and nearly fell, but every time the pony was able to regain its foothold and dashed forward with undiminished speed.
Reuben was now aware that the animal he was riding was breathing heavily and doubtless was feeling the effect of its swift pace after the long ride of the day. As soon as he had secured the cow he desired—for now the young trapper had selected the animal which he intended to shoot—he decided that he would give his horse a long rest before he returned to the camp.
Suddenly one of the forefeet of his horse sank into a hole which the prairie-dogs had made. Glancing about him, Reuben saw that he was in the midst of a village of the little animals. With an effort he maintained his seat in the saddle, for he was an expert horseman, and an ordinary fall had little peril for him. This time, however, his horse was unable to regain its foothold. It stumbled and staggered several steps, and then with a groan sank to the ground.
As it fell, Reuben slipped from its back and leaped lightly to the ground. Advancing to the head of his horse, he seized the bridle and attempted to lift the animal to its feet. It was unable to rise, and a brief examination convinced the young trapper that the fall had broken its leg.
The thunder of the flying herd now sounded farther away. In the dim light Reuben saw that the buffaloes were still running swiftly and were headed for a valley or defile among the hills not far distant. Once there, doubtless they would be secure from attack.
His own predicament, however, was too appalling to enable Reuben long to think of the fleeing herd. He was miles distant from his companion, his horse had fallen with a broken leg, and night was upon him, while his perils doubtless would be greatly increased before morning came. For a moment the heart of the young hunter was heavy. A groan of his faithful pony recalled him to the necessity of action. There was no hope of restoring the suffering brute, and, advancing to its head, without hesitating a moment, Reuben fired at the heart of the panting, suffering animal. With scarcely a quiver the horse became still.
His own problem, however, was still unsolved, as Reuben now was fully aware. The cloud of dust in part had disappeared in the dim light. He looked all about him, but not a trace of Jean or the camp was he able to discover. He was alone on the trackless plains and by no means certain of the direction in which he had come or of the way in which he should go.