Still there was no firing. The Indians must have felt more certain than ever of their prey, thus to hold their shots. They emitted several whoops of exultation, and the foremost bounded from their ponies and sped after the fugitives like so many bloodhounds. But the separation of the latter compelled a division of the former, who, it will be remembered, were scattered at varying distances, only a couple being at the heels of the young ranchers. Thus it came about that each was pursued by a single warrior, and through a whim which cannot be fully understood, the Sioux next to the leaders turned to the left on the trail of the young Irishman, who had thus the honor, if it may be so considered, of attracting the greater attention. For a few moments Warren devoted his energies to running. He bounded like a hare over the first bowlder that interposed, swerved slightly to the right, to pass an obstructing rock, and went up the slope with the same headlong speed with which he had dashed from the level ground to the bottom of the slope. It was not until he had sped fully a hundred yards in this furious fashion that he ventured to throw a glance over his shoulder. Then he learned that there was but a single Sioux in sight. The fugitive had held his own so well against this miscreant, that the latter must have felt a quick fear of his escaping him altogether. Young Starr was an unusually swift sprinter, and it may be doubted whether the fleet-footed Indian could have run him down in a fair contest. The fear of losing the young man caused the Sioux to check himself abruptly, bring his gun to a level, and let fly. An extraordinary accident, or rather providence, saved the fugitive. At the very instant of his enemy firing, Warren's foot slipped in the snow, and he stumbled on his hands and knees. Certain that his fall was due to the bullet just sent after him, the Sioux, with a whoop of triumph, bounded forward over the bowlders and around the rocks to finish him. Warren saw, with lightning-like quickness, that his fall might be his salvation. It had deceived his foe into the belief that he was either killed or mortally hurt, and he was, therefore, unprepared for that which followed. The youth did not attempt to rise. He had slipped down in such a position that he was hidden from the sight of his pursuer. He quickly shifted around so as to face him, and, rising on one knee, held his Winchester pointed and ready for use. He had not long to wait. The Sioux was so close that the next minute his head and shoulders appeared above the rock, as he took his tremendous strides toward the lad, whom he expected to see stretched helpless on the snowy earth. The sight of him kneeling on one knee, with his rifle aimed, his eye ranging along the barrel, and his finger on the trigger, was the first startling apprisal of the real state of affairs.