Brooks, T. B. (Thomas Benton). "Map showing siege operations against Forts Sumter and Wagner between July 13th & Sept. 7th, 1863." Map. Washington, D.C.: Published by permission of Gen'l Gillmore at the U.S. Coast Survey Office, [1863]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:9s161c211 (accessed April 25, 2024).