Hergesheimer, E. (Edwin). "Plan of Fort Jackson, showing the effect of the bombardment by the U.S. mortar flotilla and gunboats, April 18th to 24th 1862." Map. Washington, D.C.: U.S. Coast Survey, [1862?]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:ww72bn89r (accessed April 23, 2024).