Jack Dudley, being some paces in advance of Fred Greenwood, and alarmed for him because of his greater peril, had slightly slackened his speed, for he was not the one to seek safety at the expense of his comrade. The instant he saw him fall he stopped short, and, wheeling about, fired at the grizzly, and pumping a second cartridge into the chamber of his Winchester, let fly again, both shots striking the beast, who was so close that a miss was impossible. It need not be said that Fred, having pitched forward on his hands and knees, did not remain thus. No hunter, even if a youth, gives up so long as there is a fighting chance for life. He instantly leaped to his feet, and a couple of bounds placed him beyond reach, for the moment, of his terrible enemy. The bear seemed to understand who had wounded him last, and, although closer to Fred than to his companion, he swerved to the left and headed for Jack Dudley. The latter did not stay on the order of his going, but made off at his highest speed. Brief as was the halt, it wrought a complete change of situation. Whereas Fred had been in the greatest danger, Jack was now thus placed, because the grizzly was closer to him. Not only that, but, ignoring the younger lad, he gave his whole attention to Jack. Events were going with such a rush that the boys were almost overwhelmed before they could help themselves. Fred supposed the bear was at his heels until, having run a couple of rods, he glanced over his shoulder and saw the imminent peril of Jack. Then, with a thrill of alarm, he in his turn checked his flight, and bringing his Winchester to a level drove a bullet into the immense head of the brute, which by that time had received a respectable amount of lead in his carcass. But "old Ephraim" seemed to have determined to dispose of the fugitives in the reverse order of their ages; that is to say, having changed his attentions to Jack Dudley, he did not mean to be diverted therefrom, even though the younger lad was showing disagreeable interest in him. This peculiar turn of affairs gave Fred his favorable chance; and, standing motionless, he continued his miniature bombardment as fast as he could shove the cartridges into the chamber of his weapon, aim, and fire. Surely the bullets, all of which found a lodgment somewhere in the anatomy of the monster, must have produced an effect, but they could not divert him from his main purpose. He bore down upon the apparently doomed Jack Dudley as if he would not be denied. This fact caused Fred to be thrown partly to the rear, so that the remarkable combat took the form of the grizzly pursuing one of the boys, while the other boy was pursuing the grizzly. The position of Fred, however, thus became unfavorable, for he was unable to aim at any vulnerable portion of the creature. He continued firing into his body, but the bullets produced no perceptible effect in this fight for life.