This primary source comes from the Records of the Panama Canal.
National Archives Identifier:
6860348Full Citation: State of Work on the French Construction of the Panama Canal Showing Rail Transport Car on Tracks; 8/1886; Records of the Panama Canal, Record Group 185. [Online Version, https://www.docsteach.org/documents/document/state-of-work-on-the-french-construction-of-the-panama-canal-showing-rail-transport-car-on-tracks, April 25, 2024]