Engines on the Union Pacific RR, 1883

From: waylon@digitrove.net

I'm doing research for a documentary and we need photos of the type/model of passenger trains that would have been operating from San Francisco to east coast between 1880 and 1884, 1883 to be exact. Would you have any information on that or know of a good source? We need the photo's as reference to create a 3D model.

—Waylon McGuigan, Producer, Digitrove Media Production Company