A story from the collection Do Not Exceed the Stated Dose. Whilst John and Olga Hitchman are at the Theatre Royal enjoying their usual box, they become the victims of a professional thief who has his eye on their Fabergé egg as an Easter gift for his partner. Known only as 'Macavity', the name given to him by the press, this thief thinks he’s untouchable. But that was before he had detective Peter Diamond on his tail.