But when scarcely ten feet remained to stalk, a sudden sound pricked through the darkness. It came from afar, but it was no less terrible. It was really two sounds, so close together that they sounded as one. Neither Blacktail nor Whisperfoot had any delusions about them. They recognized them at once, in strange ways under the skin that no man may describe, as the far-off reports of a rifle. Just to-day Blacktail had seen his doe fall bleeding when this same sound, only louder, spoke from a covert from which Bert Cranston had poached her,--and he left the lick in one bound. Terrified though he was by the rifle shot, still Whisperfoot sprang. But the distance was too far. His outstretched paw hummed down four feet behind Blacktail's flank. Then forgetting everything but his anger and disappointment, the great cougar opened his mouth and howled. Howling, the forest people know, never helped one living thing. Of course this means such howls as Whisperfoot uttered now, not that deliberate long singsong by which certain of the beasts of prey will sometimes throw a herd of game into a panic and cause them to run into an ambush. All Whisperfoot's howl of anger achieved was to frighten all the deer out of his territory and render it extremely unlikely that he would have another chance at them that night. Even Dan and Lennox, too far distant to hear the shots, heard the howl very plainly, and both of them rejoiced that he had missed. The long night was almost done when Whisperfoot even got sight of further game. Once a flock of grouse exploded with a roar of wings from a thicket; but they had been wakened by the first whisper of dawn in the wind, and he really had no chance at them. Soon after this, the moon set. The larger creatures of the forest are almost as helpless in absolute darkness as human beings. It is very well to talk of seeing in the dark, but from the nature of things, even vertical pupils may only respond to light. No owl or bat can see in absolute darkness. Although the stars still burned, and possibly a fine filament of light had spread out from the East, the descending moon left the forest much too dark for Whisperfoot to hunt with any advantage. It became increasingly likely that he would have to retire to his lair without any meal whatever. But still he remained, hoping against hope. After a futile fifteen minutes of watching a trail, he heard a doe feeding on a hillside. Its footfall was not so heavy as the sturdy tramp of a buck, and besides, the bucks would be higher on the ridges this time of morning. He began a cautious advance toward it.