According to BoCo's story, Silver was once the fastest engine in the hills, with silver paint to suit his name, and was always boasting to the other engines. At last, a wizard was tired of Silver's boasting and put a curse on him, turning Silver into a rusty slow engine. He became the laughing stock of the other engines and was renamed Tramp.
Silver was a boastful engine who did not stop boasting until he was changed into a rusty old engine.
- The Magic Spell (mentioned)