She was lost to sight at once in the darkness, but for fully thirty yards he raced in her pursuit. And it is true that deep down in his own well of instincts--those mysterious waters that the events of life can hardly trouble--he really didn't expect to overtake her. If he had stopped to think, it would have been one of the really great surprises of his life to hear the sudden, unmistakable stir and movement of a large, living creature not fifteen feet distant in the thicket. He didn't stop to think at all. He didn't puzzle on the extreme unlikelihood of a doe halting in her flight from a cougar. It is doubtful whether, in the thickets, he had any perceptions of the creature other than its movements. He was running down wind, so it is certain that he didn't smell it. If he saw it at all, it was just as a shadow, sufficiently large to be that of a deer. It was moving, crawling as Woof sometimes crawled, seemingly to get out of his path. And Whisperfoot leaped straight at it. It was a perfect shot. He landed high on its shoulders. His head lashed down, and the white teeth closed. All the long life of his race he had known that pungent essence that flowed forth. His senses perceived it, a message shot along his nerves to his brain. And then he opened his mouth in a high, far-carrying squeal of utter, abject terror. He sprang a full fifteen feet back into the thickets; then crouched. The hair stood still at his shoulders, his claws were bared; he was prepared to fight to the death. He didn't understand. He only knew the worst single terror of his life. It was not a doe that he had attacked in the darkness. It was not Urson, the porcupine, or even Woof. It was that imperial master of all things, man himself. Unknowing, he had attacked Landy Hildreth, lying wounded from Cranston's bullet beside the trail. Word of the arson ring would never reach the settlements, after all. And as for Whisperfoot,--the terror that choked his heart with blood began to wear off in a little while. The man lay so still in the thickets. Besides, there was a strange, wild smell in the air. Whisperfoot's stroke had gone home so true there had not even been a fight. The darkness began to lift around him, and a strange exultation, a rapture unknown before in all his hunting, began to creep into his wild blood. Then, as a shadow steals, he went creeping back to his dead. V