Vincennes (Ind.). Commissioner's Office. "Plat of the ancient possessions of the upper prairie confirmed by the governors, their continuation from the Elm road to the Wabash and Indian Field." Map. Vincennes, Ind: Commissioner's Office, [1806]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:4m90f7859 (accessed April 24, 2024).