Substitute professor or not, Declan had not been on the Hogwarts grounds once since the school year had started. Not since he first was introduced to the other professors - some of which, of course, he did not get along with - and had met the new leadership for the school. A single toe had not passed through the gates. And somehow, even though he was helping with the Halloween activities for the Hogwarts students, he still hadn't actually made it back into the castle or onto the grassy hills surrounding it. Instead, he was out in Hogsmeade, giving out treats and helping students make their own.
The Transfiguration professor had made a stop at his booth for a few minutes, trying to correct their initially negative encounter, but once Declan had decided he disliked someone, it took more than a greeting and a chat about costumes to change his mind. He did endeavor to be polite, though, and passed her a sugar cookie that donned a colorful pumpkin in moulded chocolate. It was taken from a plate charmed to keep away any gnats or other critters interested in what had been made, which had been put next to the cotton candy roller.
On the opposite side of his booth's table, pulled sugar in the shape of trees and all manner of halloween-type creatures. Owls, bats and things like that. Declan had apparently surprised Adrienne with his so-called 'mastery' of deserts, but the man tended to lean more towards his array of dinner ideas when discussing what he was skilled at. That, and of course piano, though that wasn't ever discussed with anyone outside of his family.
As he glanced around the streets of Hogsmeade, Declan couldn't help but wonder what Henry would have thought of him. After all, the younger man was of the same background - both being Muggleborns - so he was certainly one of the ones who would recognize his decision to dress as the Phantom. It seemed oddly fitting, if not over dramatic, for who he was as a person, and Declan decided it was all the more intriguing that way. So he decided to simply gaze around at all of the excitement until some student or professor - or anyone, really - decided they were curious enough to stop by.