Venny is also the headmaster, by the way.
Is his surname Jones by any chance ;)
Also, "like you live under a staircase" From looking at his room...doesn't he?
That he is, the son of Jones!
And no, he doesn't live under the stairs. More like a storage room for unused library books. His room just has stairs that lead to the attic, and there's crates of books under those stairs so he can't sleep there anyway.