And it was in this way that the ghosts of the city were parcelled off, ushered from the streets into derelict buildings, made to stand in exhibition cases, hurried into the pages of books and diaries, and folded away. For, after all, ghosts can only live in the darkness; and once the dark places are closed up, their cast-iron locks bolted fast, it is easy for those who do not live with them to pretend that ghosts do not exist at all.