Why couldn’t anyone else hear the tapping? It was there in the night, but when Tom went to his mother’s room to tell her about it, she just mumbled something about dreams, rolled over, and sent him back to bed. All through his maths exam Tom was put off by the rhythmical clicks from the street outside. Afterwards, his friends said they didn’t know what he was talking about. Was he going mad?
Even he thought so when the sound started up again on a school trip to the museum. He followed the taps down a corridor, ignoring glass cases of stuffed animals on either side. The door ahead of him was marked ‘private’, but he couldn’t resist the urge to turn the handle. At first, he thought the room was empty, but then...