My father and Christopher are geniuses, do you know that? Real geniuses. Like Leonardo da Vinci. He was a mundane who—” “I know who Leonardo da Vinci is.” Matthew glanced at him and smiled: it was The Smile, gradual and illuminating as sunrise, and James had the sinking feeling that he might not be immune after all. “ ’Course you do, James,” said Matthew. “Forgot who I was talking to for a moment there.