This classroom is at the base of North Tower. It is a round room, accessed by means of a ladder through a ceiling trapdoor from the room below. There is an oppressive fire with a copper kettle that gives off sweet-smelling fumes... The walls are lined with shelves, upon which are set tea cups, crystal balls, decks of cards, etc. Small round tables and squashy armchairs and little pouffes adourn the floor at which students take their places at. There is at least one window which is opened just a crack to let fresh air into the room.