The General Map of Charleston Harbor from 1865, shows rebel defenses and obstructions during the American Civil War. It was prepared under directions from Rear Admiral JA Dahlgren, by CO Boutelle, drawn by Eugene Willenbücher and had lithography at the US Coast Survey by CG Krebs. The map notes that the survey of the channels, fortifications etc. was made after the occupation of the Harbor by the U.S. Naval forces and includes a table of armament of rebel forts. The map also shows a plan of the city, location of shipwrecks, torpedoes and obstructions, roads, and railroads.
