George MacDonald, one of C.S. Lewis’ greatest influences, once wrote a fascinating little play called “The Light Princess.” It begins with somewhat familiar tropes. A king and queen have no heir, until finally they are blessed to conceive. In their joy, the king hand writes invitations to the girl’s christening and sends them out, but he neglects to send one to his sister, Makemnoit. Makemnoit is a clever, wise woman, it is explained, but also a witch. The lack of an invitation grates at her, so she decides to teach her brother a lesson.