‘Oh, do you mean Oswald?’ ‘There’s an invisible man called Oswald who can get into my bedroom?’ said Tiffany, horrified. ‘Oh, no. That’s just a name. Oswald isn’t a man, he’s an ondageist. Have you heard of poltergeists?’ ‘Er . . . invisible spirits that throw things around?’ ‘Good,’ said Miss Level. ‘Well, an ondageist is the opposite. They’re obsessive about tidiness. He’s quite handy around the house but he’s absolutely dreadful if he’s in the kitchen when I’m cooking. He keeps putting things away. I think it makes him happy.
