We call Harry over who listens for a voice, saying “Hello, hello whoever you are”, into the mouth piece before passing it back with a you-got-me expression.
He sees we’re not laughing.
“I’m in perplexion. Who was that?” asks Harry with a baffled expression.
I check the cell and the line’s dead.
Excerpt from chapter 29 of "Sixteen stories, no pets" by C.J. Beck