Making it towards the Come and Go room, she phased through the wall. Not one to be shown up, I shifted out of the material plane and followed her. We emerged into the base room, where all the lost items get collected. Items that the room uses to create the custom rooms. Various furniture, clothes, teddy bears. They were all found here. Hogwarts was generally good about giving items back if someone needs it back, but those that were truly lost? They ended up here.