Surveyor's maps from 1856 and 1887 showing Kansas Territory, Baldwin City, Kansas, and the battlefield of Black Jack Battle. Aerial photographs, taken in 2002, show the current location of the historic site. A map, created in GIS, highlights the trail, Black Jack Creek, and the current trail markers for the Battle of Black Jack, RH MS Q363, Box: 1, Folder: 1. Application to the National Register of Historic Places, RH MS 1275. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/187927 Accessed May 19, 2024.