"The ghosts?" There's ghosts in the library? "I did get sucked into that conga line..." Ghosts would be a logical explanation for that - and they're all dead, aren't they? So it would make sense here more so than anywhere else that there's ghosts. But... he's still a bit sceptical.

"Alright, I'll-- give that a go. Cheers." He would still feel like a dirty thief - he would have at least offered to work off his debt or something - but if everyone's doing it then maybe he'd feel less bad about it.

"Is there anything... else that's a little strange around these parts?"