"Out!" yelled Rea. "They're on the dogs!"

Jones pushed his cocked rifle ahead of him and straightened up outside the tepee. A wolf, large as a panther and white as the gleaming snow, sprang at him. Even as he discharged his rifle, right against the breast of the beast, he saw its dripping jaws, its wicked green eyes, like spurts of fire and felt its hot breath. It fell at his feet and writhed in the death struggle. Slender bodies of black and white, whirling and tussling together, sent out fiendish uproar. Rea threw a blazing stick of wood among them, which sizzled as it met the furry coats, and brandishing another he ran into the thick of the fight. Unable to stand the proximity of fire, the wolves bolted and loped off into the woods.

"What a huge brute!" exclaimed Jones, dragging the one he had shot into the light. It was a superb animal, thin, supple, strong, with a coat of frosty fur, very long and fine. Rea began at once to skin it, remarking that he hoped to find other pelts in the morning.

Though the wolves remained in the vicinity of camp, none ventured near. The dogs moaned and whined; their restlessness increased as dawn approached, and when the gray light came, Jones founds that some of them had been badly lacerated by the fangs of the wolves. Rea hunted for dead wolves and found not so much as a piece of white fur.

Soon the hunters were speeding southward. Other than a disposition to fight among themselves, the dogs showed no evil effects of the attack. They were lashed to their best speed, for Rea said the white rangers of the north would never quit their trail. All day the men listened for the wild, lonesome, haunting mourn. But it came not.

A wonderful halo of white and gold, that Rea called a sun-dog, hung in the sky all afternoon, and dazzlingly bright over the dazzling world of snow circled and glowed a mocking sun, brother of the desert mirage, beautiful illusion, smiling cold out of the polar blue.

The first pale evening star twinkled in the east when the hunters made camp on the shore of Artillery Lake. At dusk the clear, silent air opened to the sound of a long, haunting mourn.

"Ho! Ho!" called Rea. His hoarse, deep voice rang defiance to the foe.

While he built a fire before the tepee, Jones strode up and down, suddenly to whip out his knife and make for the tame little musk-oxen, now digging the snow. Then he wheeled abruptly and held out the blade to Rea.

"What for?" demanded the giant.