United States. Army. Office of the Chief of Engineers. "Topographical map of the approaches and defences of Knoxville, E. Tennessee, shewing the positions occupied by the United States & Confederate forces during the siege." Map. S.l: s.n., [1864]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:kk91ft18g (accessed March 28, 2024).