Working Whistles is a magazine story.
One day, Emily drops off Stephen, Bridget and Lady Hatt at the main station. They are going to watch a film about birds in the countryside. Later, Emily comes back early and waits for them to return, but things take a turn for the worse when the guard drops his whistle and the station porter accidentally runs over it with a luggage trolley. Unable to start the train without a guard's whistle, panic strikes until Stephen and Bridget return with toy whistles that make the sound of tweeting birds. This gives Emily an idea and the guard allows them to ride in the guards van using their whistles to signal the trains allowing Emily to keep on working.