This was his last act of preparation before evening came on. He knew of evening as a gradual failing of the light, a growth of shadows in the continual drift of snowflakes, a shift from gray to black. At one time it had been afternoon; then afternoon resembling evening. Then night. Reuben became ears and eyes. He could never hear their feet when they came, but all night he must listen for any change in Ben's breathing or any call from him, such a sound as might be smothered by fire noises or the small narcotic monotone of the snow. He sought to imitate Ben's way of looking everywhere, never allowing his gaze to become frozen in a stare. If something seemed to move out yonder, as happened many times deceivingly after darkness beyond the fire had grown complete, he must flick a glance at it, look away, return, and so assure himself that it was nothing, maybe a leap of fire-shadow, a harmless swaying of a branch of the giant spruce that stood twenty yards away. He knew the truth of it, and with relief because it ended the sour agony of anticipation, when twin emeralds to the left of the spruce blinked on and off and shone again nearer. Two other pairs of jewels flashed into life, one to the right, the third directly below the tower of the tree. "I know you," he called. "I know you for what you are." He stood up to look beyond the lean-to. A fourth pair of hunting lights had been approaching the blind spot, and halted at sight of him. Reuben drew forth a burning stick. He walked slowly, with care for the flame, and touched it to the dead wood and pine needles. The lights in the snow did not retire; they watched, curious and cold. In the sudden radiance they acquired a gray body, taut, startled at the new flame but not yet in retreat and visible to Reuben in sharp detail. A bitch wolf carrying young, her belly not much distended but seeming so because of the gauntness of her ribs and a wiry thinness of long flanks.