There, in the doorway, stood an animal, with neck and muzzle thrust forward, its head poking into the night, its whole body poised in that attitude of intense rigidity that precedes the spring into freedom, the running leap of attack. It seemed to be about the size of a calf, leaner than a mastiff, yet more squat than a wolf, and I can swear that I saw the fur ridged sharply upon its back. Then its upper lip slowly lifted, and I saw the whiteness of its teeth.