“Laura knew then that she was not a little girl any more. Now she was alone; she must take care of herself. When you must do that, then you do it and you are grown up. Laura was not very big, but she was almost thirteen years old, and no one was there to depend on. Pa and Jack had gone, and Ma needed help to take care of Mary and the little girls, and somehow to get them all safely to the west on a train.”