Diamond Stack steam engine #236, in downtown Ottumwa. This coal-fired engine had a 0-4-2 configuration (0 pony wheels, 4 drive wheels, 2 trailers). This engine was hand-fired, carrying a fireman who shoveled coal into the firebox. For more information on the Michael Lemberger Collection visit https://aspace.lib.uiowa.edu/repositories/2/resources/3157