The spear he had dropped when he sprang, but his long knife gleamed in his hand, and he stabbed, once, twice, sending the blade home under the brute's shoulder. He released his grip, spurned the yielding body with his foot, and the huge hulk rolled from the path down the slope, crimsoning the snow with its blood. Polaris bounded across the narrow ledge and regained his spear. He smiled as there arose from the foot of the slope a hideous clamor that told him that the pack had charged in, as usual, not to be restrained at sight of the kill. He waved his hand to the girl, who stood, statuelike, beside the sledge. Doubly enraged at its inability to participate in the battle which had been the death of its mate, the smaller bear waited no longer when the path was clear, but rushed madly with lowered head. Strong as he was, the man knew that he could not hope to stay or turn that avalanche of flesh and sinew. As it reached him he sprang aside where the path broadened, lashing out with his keen-edged spear. His aim was true. Just over one of the small eyes the point of the spear bit deep, and blood followed it. With tigerish agility the man leaped over the beast, striking down as he did so. The bear reared on its hindquarters and whimpered, brushing at its eyes with its forepaws. Its head gashed so that the flowing blood blinded it, it was beaten. Before it stood its master. Bending back until his body arched like a drawn bow, Polaris poised his spear and thrust home at the broad chest. A death howl that was echoed back from the crashing cliffs was answer to his stroke. The bear settled forward and sprawled in the snow. Polaris set his foot on the body of the fallen monster and gazed down at the girl with smiling face. "Here, lady, are food and warmth for many days," he called. CHAPTER VI INTO THE UNKNOWN Southward, ever southward, the floating glory of the jeweled tide bore them. Fast as they went, the wind-urged waters raced by them faster still. Steel-blue surges, mountain high, tore by their refuge in endless rush. From a sky gale-swept of all clouds, the sun shone steadily through nightless days. Fragment after fragment of the drifting floe was rasped away and ground to splinters among the staggering icebergs. As it dwindled in dimensions, its revolving movement increased, until it reeled onward like a giant gyroscope, and they who rode it grew giddy with its whirl. Around them nature played her heart-shaking music, and spread over glittering tide and snow-splashed icebergs the wondrous, iridescent filaments reflected from the facets of her monstrous gems. Then, as suddenly as it had risen, the wind died away. Cloudheads arose and overcast the sky, the ragged waves smoothed into long rollers, and their frightful pace was abated, although they continued to ride south with a strong tide.