“Even if I can’t live with you again, Frederick, you’ll just find someone else who can.” His eyes went hard. “Impossible. I . . .” He trailed off, then shook his head. “While yes, I suspect I could find another roommate, given adequate time, I will not find anyone who can instruct me so well as you.” That surprised me. “I’m nothing special.” His brow furrowed. Something about what I’d said bothered him, though I couldn’t imagine what it might be. “Over the past two weeks I’ve discovered that in this city of millions, you are one of a kind.”