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 Portland, Oregon on June 7, 1941.

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 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 in March 1940. Photo from the Harold Vollrath Collection.

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 315, Class N-5, at Portland, Oregon on April 13, 1931. Photo by Herbert L. Arey.

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 304, Class N-4, at Vancouver, Washington. Notice the green painted boiler and cylinder jacketing.

SP&S 2-8-0 steam locomotive Number 304, Class N-4, at the shops at Vancouver, Washington in November 1941. This locomotive was formerly Northern Pacific Number 72 built by Baldwin Locomotive Works in September 1888.

SP&S 2-8-0 steam locomotive Number 304, Class N-4, at Vancouver, Washington on November 15, 1942.

SP&S 2-8-0 steam locomotive Number 304, Class N-4, at Vancouver, Washington on November 15, 1942.

SP&S 2-8-0 steam locomotive Number 304, Class N-4, at Portland, Oregon. Photo from the Railroad Museum of Pennsylvania Collection.

SP&S 2-8-0 steam locomotive Number 304, Class N-4, at Portland, Oregon in April 1932. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 303, Class N-4, at Wishram, Washington on April 21, 1940. This locomotive was formerly Northern Pacific Number 71 built by Baldwin Locomotive Works in September 1888.

SP&S 2-8-0 steam locomotive Number 303, Class N-4, at unknown location and date.

SP&S 2-8-0 steam locomotive Number 303, Class N-4, at Lyle, Washington in 1941.

SP&S 2-8-0 steam locomotive Number 302, Class N-4, at Portland, Oregon on October 7, 1931. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 302, Class N-4, at Portland, Oregon on October 7, 1931. This locomotive was formerly Northern Pacific Number 69 built by Baldwin Locomotive Works in May 1891. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 302, Class N-4, at Portland, Oregon on June 30, 1938.

SP&S 2-8-0 steam locomotive Number 301, Class N-4, at Portland, Oregon in August 1931. This locomotive was formerly Northern Pacific Number 59 and was built by Baldwin Locomotive Works in November 1889.

SP&S 2-8-0 steam locomotive Number 301, Class N-4, at Portland, Oregon in April 1939. Photo by Herbert H. Arey.

SP&S 2-8-0 steam locomotive Number 301, Class N-4, at Portland, Oregon on April 11, 1938.

SP&S 2-8-0 steam locomotive Number 301, Class N-4, at Portland, Oregon on April 1, 1939. Photo by Emery J. Roberts.

SP&S 2-8-0 steam locomotive Number 300, Class N-4, at Vancouver, Washington on August 15, 1934. Photo by William Monypeny.

SP&S 2-8-0 steam locomotive Number 300, Class N-4, at Portland, Oregon. This locomotive was formerly Northern Pacific Number 52 that was built by Baldwin locomotive Works in May 1891. Photo by Herbert L. Arey.

SP&S 2-8-0 steam locomotive Number 300, Class N-4, at Portland, Oregon on February 6, 1932.

SP&S 0-6-0 steam locomotive Number 3, Class A-1, at Portland, Oregon, undated.

SP&S 0-6-0 steam locomotive Number 3, Class A-1, at Hoyt Street Yard in Portland, Oregon, April 21, 1940.