Recently a manuscript map entitled “Sketch of the Indian and Negro Towns on the Suwaney River” was found during a search of the National Archives and Records Service documents section by A. P. Muntz, chief of the cartographic branch. This map (RG77:L 247-94) is included in a selection of signed and dated maps filed in the records of the Office of the Chief of Engineers pertaining to military activities in northern Florida in the vicinity of the Suwannee River. Almost all are dated 1839, and were rendered by officers of the “topographical engineers” contingent assigned to military forces commanded by Brigadier General Zachary Taylor in Florida during the Second Seminole War. It is believed that this sketch map was made by Captain Hugh Young, an assistant topographical engineer. Young, a Tennessean, was a regular officer in what was known in the early part of the nineteenth century as the Corps of Topographical Engineers.
Craig, Alan K.
"Captain Young's Sketch Map, 1818,"
Florida Historical Quarterly: Vol. 48
, Article 6.
Available at: https://stars.library.ucf.edu/fhq/vol48/iss2/6