One of the Pennsylvania Railroad's Mail-Express trains, headed by a K4s locomotive with a standard coach on the rear-end, rolls through the Pennsylvania countryside on a cold, dismal day in January 1923.

Monterrey's Union station in the "Glory Days of Steam" January 1920. In this era, it was one of the finest railroad passenger depots in Mexico. This station had ten stub-end tracks. There were sixteen through passenger trains daily, inbound and outbound. In addition, there were trains originating at Monterrey, such as those to Matamoros, Nuevo Laredo, Realta, Saltillo and Tampico. The track in the foreground was a portion of Monterrey's electric street railway system. The paralleling track in the background was the main line of the National Railways of Mexico coming into Monterrey from Tampico.