Jill and Claire Cameron had been invited to London by their older cousin, Miriam Hill, to watch a royal wedding. The girls booked into a hotel, but the next morning, Miriam had vanished. Not only had Miriam disappeared, but so had her room — Room 13.
- Art: John Armstrong
- The Mystery of Room 13 – Judy: #1494 (27 August 1988) – (?)