The driver of Spokane, Portland and Seattle Transportation Company stage Number 1 helping a passenger exit at Portland, Oregon. This bus was built by the White Motor Company. Photo by Arthur M. Prentiss.

View of the Municipal Stage Terminal in Portland, Oregon that was located on Salmon Street between Fifth and Sixth streets and was the terminal of the Spokane, Portland and Seattle Transportation Company which operated buses to Astoria and Seaside. Photo by Sowell Studio.

View of the ticket office and waiting room in the Municipal Stage Terminal in Portland, Oregon. This was the terminal of the Spokane, Portland and Seattle Transportation Company which operated buses to Astoria and Seaside. Photo by Arthur M. Prentiss.

View of the interior of the confectionery that operated in the Municipal Stage Terminal in Portland, Oregon. This was the terminal of the Spokane, Portland and Seattle Transportation Company which operated buses to Astoria and Seaside.

Spokane, Portland and Seattle wood coach Number 220 at Portland, Oregon.

Spokane, Portland and Seattle wood coach Number 220 at Portland, Oregon.

Spokane, Portland and Seattle wood coach Number 220 at Portland, Oregon in August 1949. Photo by A.C. Phelps.

Spokane, Portland and Seattle wood coach Number 220 at Portland, Oregon in August 1949. Photo by A.C. Phelps.

Spokane, Portland and Seattle wood coach Number 218 at Portland, Oregon on November 9, 1945.

Spokane, Portland and Seattle wood coach Number 218 at Portland, Oregon on November 9, 1945.

Interior of Spokane, Portland and Seattle steel coach Number 275 just after departing Portland, Oregon on Train Number 21 heading for Astoria and Seaside on September 18, 1951 with Conductor Dan McDougall collecting tickets. Photo by Carl C. Vermilya.

Rear view of Spokane, Portland and Seattle solarium observation car at Portland, Oregon with drumheads for the Northern Pacific "North Coast Limited" and the Great Northern "Empire Builder".

Spokane, Portland and Seattle mail storage car Number 57 at Portland, Oregon. This car was rebuilt by the SP&S from Pullman tourist sleeping car TC 1431 "Sakana" in 1950.

Spokane, Portland and Seattle mail storage car Number 57 at Portland, Oregon. This car was rebuilt by the SP&S from Pullman tourist sleeping car TC 1431 "Sakana" in 1950.

Spokane, Portland and Seattle mail storage car Number 56 at Portland, Oregon.

Spokane, Portland and Seattle mail storage car Number 56 at Portland, Oregon.

Spokane, Portland and Seattle mail storage car Number 55 at Portland, Oregon in August 1969. This car was rebuilt by the SP&S from Pullman Tourist Sleeping Car TC 1211 "Caspar" in 1950.

Spokane, Portland and Seattle mail storage car Number 55 at Portland, Oregon in August 1969. This car was rebuilt by the SP&S from Pullman Tourist Sleeping Car TC 1211 "Caspar" in 1950.

Spokane, Portland and Seattle mail storage car Number 52 (3rd) at Portland, Oregon.

Spokane, Portland and Seattle mail storage car Number 52 (3rd) at Portland, Oregon.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 46 at Portland, Oregon. This car was rebuilt by SP&S from Pullman Tourist Sleeping Car TC 1391 "Pampanga" in 1948.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 46 at Portland, Oregon. This car was rebuilt by SP&S from Pullman Tourist Sleeping Car TC 1391 "Pampanga" in 1948.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 46 at Portland, Oregon in June 1968.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 46 at Portland, Oregon in June 1968.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 45 at Portland, Oregon.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 45 at Portland, Oregon.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 44 at Portland, Oregon on June 20, 1953. Photo by W.C. Whittaker.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 44 at Portland, Oregon on June 20, 1953. Photo by W.C. Whittaker.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 44 at Portland, Oregon on August 10, 1949. This car was formerly Great Northern Number 187 and was purchased by the SP&S in June 1929. Photo by A.C. Phelps.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 44 at Portland, Oregon on August 10, 1949. This car was formerly Great Northern Number 187 and was purchased by the SP&S in June 1929. Photo by A.C. Phelps.