The National Archives’ Cartographic Branch contains more than 69 record groups and 215 series that include maps, architectural and engineering drawings, and aerial photographs that all relate to railroads in the United States, with widespread coverage of regions all over the world. The dates of these records range from 1828 to 2009, with the bulk of records covering other countries and regions from the early to mid 20th century. [Read more…] about Railroad Records at the National Archives: A Primer