Things the castle ghosts know

- What all the best dressed women wore in the fourteenth century, the really proper ones. (I've found several giggly sorts who love to talk all about fashion, but you can't much of an idea about colours, because, of course, their clothes are all transparent.)

- What all the really improper women of the fourteen century wore. Or did not wear. Oddly enough, you can learn more about that sort of thing more from the male ghosts. Particularly the ones between their late teens and early thirties. I think that at least one or two were killed by jealous husbands.

- What every Professor's favourite dessert is. Ghosts notice things like that. Except Professor Acton, who never eats sweets at all.

- The histories of all the students named on the plaques in the trophy room.

- Which students have nightmares. There are several ghosts who take a rather professional interest (I won't name any names, of course, because I think that's rather personal. I suppose ghosts must get less fussy about personal boundaries after two or three hundred years of passing through walls.)

- Ghosts can be just as lonely as people. Living people, I mean.