United States. Army. Corps of Topographical Engineers. "Siege of Vera Cruz, by the U.S. troops under Major General Scott, in March 1847, from surveys made by Major Turnbull, Captains Hughes, McClellan, & Johnston; Lieutenants Derby & Hardcastle, Topl. Engineers." Map. Washington, D.C.: Corps of Topographical Engineers, [1847]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:4m90fj65p (accessed April 23, 2024).