"Of course. I ought to make a round, too." Just to make sure that no one was up to any particularly obvious Halloween pranks. Filch often made out pretty well around this time of year, as far as confiscations went. "Ten minutes?"
He shouldn't have given himself even that long to think about what he was doing. But after spending the evening steeped in all the muck he'd dredged up from his past, everything seemed so ... not unimportant, but simple. Relative to what had gone before, nothing could be very bad. And it might even be much better.