shut the tighter as the knives clashed together, and he thrust or eluded with a coolness born of conscious strength. At first he felt compassion for his enemy; but this fled before the primal instinct of life, which in turn gave way to the lust of slaughter. The ten thousand years of culture fell from him, and he was a cave-dweller, doing battle for his female.
Twice he pricked the Bear, getting away unscathed; but the third time caught, and to save himself, free hands closed on fighting hands, and they came together. Then did he realize the tremendous strength of his opponent. His muscles were knotted in painful lumps, and cords and tendons threatened to snap with the strain; yet nearer and nearer came the Russian steel. He tried to break away, but only weakened himself. The fur-clad circle closed in, certain of and anxious to see the final stroke. But with wrestler's trick, swinging partly to the side, he struck at his adversary with his head. Involuntarily the Bear leaned back, disturbing his centre of gravity. Simultaneous with this, Mackenzie tripped properly and threw his whole weight forward, hurling him clear
