Four unnamed blue engines have appeared in various magazine stories and other books. A blue tank engine made an appearance in the book, The Monster Under the Shed. He was not named. This engine was mentioned in a story told by James, and was said to always be ready to help. One night, a stationmaster asked him to get a coach that was left behind. The engine went to get it, but when the weather turned bad, he had to sleep in an old shed. Later, he woke up to a noise and when he opened his eyes, h
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