The Magic Swan

There were once upon a time three brothers, of whom the eldest was called Jacob, the second Frederick, and the youngest Peter. This youngest brother was made a regular butt of by the other two, and they treated him shamefully. If anything went wrong with their affairs, Peter had to bear the blame and put things right for them, and he had to endure all this ill-treatment because he was weak and delicate and couldn't defend himself against his stronger brothers....