The animal was approximately one hundred feet behind. It wasn't a wolf, she thought. The wolves ran in packs this season, and except in winter were more afraid of human beings than any other living creature. It wasn't a lynx--one of those curiosity-devoured little felines that will mew all day on a trail and never dare come near. It was much too large for a lynx. The feet fell too solidly. She had already given up the idea that it could be Woof. There were no dogs in the mountains to follow at heel; and she had no desire whatever to meet Shag, the faithful hybrid that used to be her guardian in the hills. For Shag had gone to his well-deserved rest several seasons before. Two other possibilities remained. One was that this follower was a human being, the other that it was a cougar. Ordinarily a human being is much more potentially dangerous to a woman in the hills at night than a cougar. A cougar is an abject coward and some men are not. But Snowbird felt herself entirely capable of handling any human foes. They would have no advantage over her; they would have no purpose in killing from ambush; and she trusted to her own marksmanship implicitly. While it is an extremely difficult thing to shoot at a cougar leaping from the thicket, a tall man standing on a trail presents an easy target. Besides, she had a vague sense of discomfort that if this animal were a cougar, he wasn't acting true to form. He was altogether too bold. She knew perfectly that many times since men came to live in the pine-clad mountains they have been followed by the great, tawny cats. Curiosity had something to do with it, and perhaps less pleasing reasons. But any dreadful instincts that such a cat may have, he utterly lacks courage to obey. He has an inborn fear of men, a fear that goes down to the roots of the world, and he simply doesn't dare make an attack. It was always a rather distressing experience, but nothing ever came of it except a good tale around a fireside. But most of these episodes, Snowbird remembered, occurred either in daylight or in the dry season. The reason was obviously that in the damp woods or at night a stalking cougar cannot be perceived by human senses. Her own senses could perceive this animal all too plainly,--and the fact suggested unpleasant possibilities. The animal on the trail behind her was taking no care at all to go silently. He was simply pat-patting along, wholly at his ease. He acted as if the fear that men have instilled in his breed was somehow missing. And that is why she instinctively tried to hurry on the trail. The step kept pace. For a long mile, up a barren ridge, she heard every step it made. Then, as the brush closed deeper around her, she couldn't hear it at all.