Without being able to see, Gray Wolf seemed to realize what had happened. Again she was the pack-wolf--with all the old wolf strategy. Twice flung back by the old bull's horn, Kazan knew better than to attack openly again. Gray Wolf trotted after the bull, but he remained behind for a moment to lick up hungrily mouthfuls of the blood-soaked snow. Then he followed, and ran close against Gray Wolf's side, fifty yards behind the bull. There was more blood in the trail now--a thin red ribbon of it. Fifteen minutes later the bull stopped again, and faced about, his great head lowered. His eyes were red. There was a droop to his neck and shoulders that spoke no longer of the unconquerable fighting spirit that had been a part of him for nearly a score of years. No longer was he lord of the wilderness about him; no longer was there defiance in the poise of his splendid head, or the flash of eager fire in his bloodshot eyes. His breath came with a gasping sound that was growing more and more distinct. A hunter would have known what it meant. The stiletto-point of the younger bull's antler had gone home, and the old bull's lungs were failing him. More than once Gray Wolf had heard that sound in the early days of her hunting with the pack, and she understood. Slowly she began to circle about the wounded monarch at a distance of about twenty yards. Kazan kept at her side. Once--twice--twenty times they made that slow circle, and with each turn they made the old bull turned, and his breath grew heavier and his head drooped lower. Noon came, and was followed by the more intense cold of the last half of the day. Twenty circles became a hundred--two hundred--and more. Under Gray Wolf's and Kazan's feet the snow grew hard in the path they made. Under the old bull's widespread hoofs the snow was no longer white--but red. A thousand times before this unseen tragedy of the wilderness had been enacted. It was an epoch of that life where life itself means the survival of the fittest, where to live means to kill, and to die means to perpetuate life. At last, in that steady and deadly circling of Gray Wolf and Kazan, there came a time when the old bull did not turn--then a second, a third and a fourth time, and Gray Wolf seemed to know. With Kazan she drew back from the hard-beaten trail, and they flattened themselves on their bellies under a dwarf spruce--and waited. For many minutes the bull stood motionless, his hamstrung quarter sinking lower and lower. And then with a deep blood-choked gasp he sank down.