Inric stops. "What child?" he asks, without turning round. "The boy from the book thieves," says Den Arvon. "The one who arranged for your visit to the museum." "So there was a mole," Inric murmurs to himself. "You are in his debt, are you not?" Den Arvon sounds far too satisfied with himself. "I know how that works. I will set him free if you teach me."