The Southern Pacific Company, operating rail lines from Portland to New Orleans and Salt Lake City, was one of the America's most interesting railroads. Between 1855 and 1956, the SP purchased over 2,700 steam locomotives for use on lines west of El Paso, known as the "Pacific Lines."
This book addresses the last seventeen years -- 1940 to 1957 -- that steam locomotives worked for the Southern Pacific. It includes the years of World War II, when steam locomotives were purchased as rapidly as they could be obtained, as well as the postwar era. In 1944, SP decided not to purchase any more new steam locomotives, setting the stage for dieselization.