It was important to choose the exact device to drive Charles away. An imperfect magic, or one incorrectly used, might only bring more disaster upon our house. I thought of my mother's jewels, since this was a day of sparkling things, but they might not be strong on a dull day, and Constance would be angry if I took them out of the box where they belonged, when she herself had decided against it. I thought of books, which are always strongly protective, but my father's book had fallen from the tree and let Charles in; books, then, were perhaps powerless against Charles. I lay back against the tree trunk and thought of magic; if Charles had not gone away before three days I would smash the mirror in the hall.