For innumerable seconds, it seemed to Hugh, the same crescendo note was maintained. The air seemed to shudder. Then, with great soaring leaps, the scream dropped away into a long, singsong whine. Slowly this faded, growing dim and more dim, until it was just a dying whimper in the air. Hugh couldn’t tell exactly when the voice ceased. He had a strange impression that it still continued, only so dim and fine that human ears were not tuned to receive it. Then the wilderness silence closed down again. The dog leaped forward, barking, and Hugh found himself erect, with his rifle in his hands. In his own heart he knew this wilderness voice. If he did not know the breed that uttered it, at least he realized its savagery, its age-old menace. There is no utterance that pen can describe more wild and weird than some of the twilight cries of the coyotes; yet Hugh was inclined to think that another, more deadly animal had spoken in this case. On a few occasions he had heard members of his club—back from hunting trips in the West—describe the cries of the cougars or pumas: one of the most distinctive and awe-inspiring of all the wilderness voices. It is not heard often. Many men have lived years in the forest without ever hearing it at all. But once heard it is never forgotten. Hugh believed that he had heard it now. And it had meant more to him than the mere night cry of an animal. It typified to him the very spirit of the wilderness. It was the voice not alone of a hungry creature, stalking in the shadows, but—in his thought—it expressed all the ancient terror of the darkness, the primeval forces that war with man. Nothing had changed. Still the sheep slept in the meadow and a great beast of prey menaced them from the shadowed forest. The long conflicts against the powers of the wilderness had not yet been won: the shepherds of Judea might have known the same cry. The fire burned low, and it seemed to Hugh that the shadows gathered menacingly about the sheep. Perhaps Broken Fang himself had spoken. Besides its menace and savagery the voice had been also a living expression of power and pride that only one of the greatest of wilderness creatures would possess. No craven coyote, he believed, could utter such a ringing challenge. The dog raced around the flock, seemingly ready to protect them with his life. No wilderness voice was so terrible as to frighten him from his watch. And then, at the most wonderful thought of all, Hugh’s heart gave a great leap in his breast. Watching the flock! That was it,—he was watching the flock himself. True, the dog was still on guard, fearless and constant in his vigil, but he could not claim all the guardianship of the sheep. It was his own presence as much as the growlings of the dog that kept the puma at a distance. Except for him, white fangs even now would be tearing at the throats of the lambs.