Thatcher Perkins was a 4-6-0 steam engine built for the Baltimore and Ohio Railroad in 1863, and received the number 147 when it entered service. It was named for the designer, who began building 4-6-0 "Ten-Wheeler" engines to pull Union military trains during the Civil War. Thatcher Perkins was retired in 1892 after nearly thirty years of service and was preserved by the B&O. The old engine was heavily damaged in 2003 when the roof of the Baltimore and Ohio Railroad Museum collapsed and fell on several trains. However, Thatcher Perkins has now been restored to its full and original splendor.