Locomotive Historian Gilbert H. Hoffman ordered the digitization of 19 Baldwin Locomotive Works’ Extra Order Books, 1890-1909, held by SMU’s DeGolyer Library. The handwritten ledgers, which contain orders for locomotive parts from the owners of the locomotive, can be used to document ownership and/or configuration changes in the engine. A self-described “genealogist for locomotives,” Hoffman…Continue Reading Forensic Railroad History: Detecting Hidden Orders for Locomotives