Bio in the Railway SeriesEdit
Duncan was built by Andrew Barclay at Kilmarnock in Scotland and used to work in a factory which Peter Sam says that is the place where Duncan might've got his strong language and volatile plus bad tempers. The Thin Controller brought him to the railway after Peter Sam's slate trucks crashed into him in The Little Old Engine which also was Duncan's first appearance. He called the Skarloey Railway as "no good" because of his rock 'n' roll in a tunnel and even derailed at a bend in the track after Rusty was being called "smelly" by him as the Scottish tank engine got his passenger train ready near Crovans Gate.
Duncan had notably stopped on a viaduct in 1962 when his driver told him to get some water at the station and caused a long standoff. Skarloey took him to the station, but the passengers complained to Duncan and he said "no passengers, no polish". He wouldn't co-operate, but he did later on after hearing Rheneas' story trying to get home in the early 1950s and said that passengers are more important than a standoff. He continued appearing and had large speaking roles in Gallant Old Engine, Mountain Engines, Very Old Engines, Duke the Lost Engine, Great Little Engines and New Little Engine for which he joined his friends to unveil Ivo Hugh at a special ceremony in the final episode of the book itself.