But when an hour or two later they went down on the beach and found Mamie, she seemed anything but happy. Indeed, she looked as if nothing pleasant had ever happened to her in her life. She was sitting on a stone, the marks of tears all over her cheeks and now and then giving a loud, hard sob. It was more than sulkiness or ill-humor; any one who looked at the child could see that she was really unhappy. Martha, her nurse, was sitting a little way off knitting, and not taking the least notice of her.