Duke, named after the Duke of Sodor and originally called The Duke, is an orange-brown narrow gauge tank-tender engine, who is widely respected and considered a hero amongst all the engines. He initially worked on the Mid Sodor Railway as its No. 1 engine from its opening in 1880 until its closure in 1947, he was left in the abandoned sheds for the next 22 years before being found and rescued in 1969, and he was moved to the Skarloey Railway where he works today.