He sat quite still, clinching his teeth and clawing his fingers tensely. In the great crises of life, training and upbringing and education fall away, and a man is governed by two forces, his instincts and his surroundings. And Cairness's instincts were in entire accord with his surroundings; they were of the Stone Age, when men fought with the beasts of the wilderness in their cave homes, and had only the law of sheer strength. He leaned forward, holding his breath, and watched her. Had she seen his horse tied up above, and come here to find himbecause he was here?