She slipped into her free, swinging stride; and the last beams from the windows of the house were soon lost in the pines behind her. It was one of those silent, breathless nights with which no mountaineer is entirely unacquainted, and for a long tune the only sound she could hear was her own soft tramp in the pine needles. The trees themselves were motionless. That peculiar sound, not greatly different from that of running water which the wind often makes in the pine tops, was entirely lacking. Not that she could be deceived by it,--as stories tell that certain tenderfeet, dying of thirst in the barren hills, have been. But she always liked the sound; and she missed it especially to-night. She felt that if she would stop to listen, there would be many faint sounds in the thickets,--those little hushed noises that the wild things make to remind night-wanderers of their presence. But she did not in the least care to hear these sounds. They do not tend toward peace of mind on a long walk over the ridges. The wilderness began at once. Whatever influence toward civilization her father's house had brought to the wilds chopped off as beneath a blade in the first fringe of pines. This is altogether characteristic of the Oregon forests. They are much too big and too old to be tamed in any large degree by the presence of one house. No one knew this fact better than Lennox himself who, in a hard winter of four years before, had looked out of his window to find the wolf pack ranged in a hungry circle about his house. Within two hundred yards after she had passed through her father's door, she was perfectly aware that the wild was stirring and throbbing with life about her. At first she tried very hard to think of other things. But the attempt wasn't entirely a success. And before she had covered the first of the twelve miles, the sounds that from the first had been knocking at the door of her consciousness began to make an entrance. If a person lies still long enough, he can usually hear his heart beating and the flow of his blood in his arteries. Any sound, no matter how faint, will make itself heard at last. It was this way with a very peculiar noise that crept up through the silence from the trail behind her. She wouldn't give it any heed at first. But in a very little while indeed, it grew so insistent that she could no longer disregard it. Some living creature was trotting along on the trail behind, keeping approximately the same distance between them.