four o'clock in the morning
But by three o'clock she was always up and dressing . After a time the strain told on her . Lack of sleep wrote hollows around her eyes and killed some of her bright color . Between three and four o'clock in the morning she was overwhelmed on duty by a perfect madness of sleep . There was a penalty for sleeping on duty . The old night watchman had a way of slipping up on one nodding . The night nurses wished they might fasten a bell on him !