SP&S 2-8-0 steam locomotive Number 305, Class N-4, at Portland, Oregon on October 29, 1931. This locomotive was formerly Northern Pacific Number 74 built by Baldwin Locomotive Works in September 1888. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 315, Class N-5, at Portland, Oregon on April 13, 1931. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 315, Class N-5, at Portland, Oregon. This locomotive was formerly Northern Pacific Number 79 built by Baldwin Locomotive Works in October 1888. Photo from the Railroad Museum of Pennsylvania Collection.

SP&S 2-8-0 steam locomotive Number 325, Class N-6, at Portland, Oregon in March 1940. Photo from the Harold Vollrath Collection.

SP&S 2-8-0 steam locomotive Number 325, Class N-6, at Portland, Oregon on May 30, 1937.

SP&S 2-8-0 steam locomotive Number 325, Class N-6, at Portland, Oregon. This locomotive was formerly Northern Pacific Number 1255 built by the Schenectady Locomotive Works in July 1901. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 325, Class N-6, at Portland, Oregon. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 326, Class N-6, at Portland, Oregon on June 7, 1941.

SP&S 2-8-0 steam locomotive Number 326, Class N-6, at Vancouver, Washington in 1931. This locomotive was formerly Northern Pacific Number 1260 that was built by Schenectady Locomotive Works in ugust 1901. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 326, Class N-6, at Vancouver, Washington on August 29, 1940. Photo by Harold Hill.