Carte de visite by unidentified photographer. "Yard Engine Union Pacific" is written in period pencil on the back of this late 1860s photograph showing a train and its crew. Smoke belches from the engine stack, and a man wearing a brimmed hat is barely visible in the recessed shadows of the cab. A plaque on the side of the cab includes the name of the engine, but it is not readable, although it appears to be two initials and a four-letter word or number. Behind the gent in the cab, standing on the edge of the coal tender, is a man wearing a coarse, light-colored overshirt. Another trainman, hidden in shadow, stands to his left. This individual appears to be wearing an engineer's cap. Two more men stand on the flat cars behind the coal tender. Visible in the background is the tin roof of a building, and an unstrung telegraph pole. In the foreground is a pile of loose rails.
Yard engines were used exclusively in railroad yards, often for switching engines and cars on storage tracks. The Union Pacific became the first transcontinental railroad in the United States when eastern and western tracks were joined at Promontory Summit, Utah, on May 10, 1869.
I encourage you to use this image for educational purposes only. However, please ask for permission.