Must've just been a word screw-up. Butleigh and Graves in the same sentence, though...So eerie. He can't possibly know, can he? No, of course not; I'm being silly.
Piotr is simply close friends with Professor Adams, whom Lilith is interested in. She must have given Adams permission to stay there. So no problem, just a bizarre coincidence.
It will be so weird, going into that house and needing to act as if I've never been there, before, even though I know it like the back of my hand.
And gotta remember, I don't know the House Elves, either. I'd better remind them not to call me 'Mr. Seth.'