It wasn’t until he was at the Great Hall that he stumbled across another human being - Minerva McGonagall was sat alone at the faculty table, and looked increasingly alarmed by his appearance and the mild limp in his step as he approached the Gryffindor table. She was on her feet and in front of him before he had even decided whether or not to eat in the Great Hall, or simply fill his bag and take it with him to the Room of Requirement.