And what a clever guy this Harpole is, isn't he? Awfully good at noticing all kinds of little unusual things about people and keeping them on file in his head. So he's built a theory around us, has he? He added two and two and came up with five, but nobody else in the house was aware there was anything to count.

Chapter 12 (p. 128) - In the Garden of Iden (1997)