She identified it at once. Only the eyes of the felines, with vertical pupils, have this identical greenish glare. The eyes of the wolves glow in the darkness, but the circles are usually just bright points. Of course it was a cougar. She didn't cry out again. Realizing at last the reality of her peril, her long training in the mountains came to her aid. That did not mean she was not truly and terribly afraid. The sight of the eyes of a hunting animal in the darkness calls up memories from the germ-plasm,--deep-buried horrors of thousands of generations past, when such lights glowed all about the mouth of the cave. Besides, the beast was hunting _her_. She couldn't doubt this fact. Curiosity might make a lion follow her, but it would never beget such a wild light of madness in his eyes as this she had just seen. Only the frenzied pulse of wild blood through the fine vessels of the corneas could occasion such a glow as this. She simply clamped down all her moral strength on her rising hysteria and looked her situation in the face. Her hand flew instinctively to her side, and the pistol leaped in the lantern light. But the eyes had already blinked out before she could raise the weapon. She shot twice. The echoes roared back, unbelievably loud in the silence, and then abruptly died; and the only sound was a rustling of leaves as the cougar crouched. She sobbed once, then hurried on. She was afraid to listen at first. She wanted to believe that her pistol fire would frighten the animal from her trail. She knew, under ordinary conditions, that it would. If he still followed, it could mean but one thing,--that some unheard-of incident had occurred to destroy his fear of men. It would mean that he had knowingly set upon her trail and was hunting her with all the age-old remorselessness that is the code of the mountains. For a little while all was silence. Then out of the hush the thickets suddenly crashed and shook on the opposite side of the trail. She fired blindly into the thicket. Then she caught herself with a sob. But two shells remained in her pistol, and they must be saved for the test. Whisperfoot the cougar, remembering the lessons of his youth, turned from the trail when he had first heard Snowbird's step. He had crouched and let her pass. She was walking into the wind; and as she was at the closest point a message had blown back to him.