Lizzie [about Henry and Margaret]: Can't you kill them both? Put a sickness on them so they die in awful pain?
Elizabeth: I cannot do that. I know my curses, but perhaps they're just wishful thinking. Perhaps I just take good luck and call it magic. My powers cannot be very strong if we find ourselves as we are now, with my son lost again and this [nods at the mandrake root Lizzie was planning to take] before us.