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.

This map, part of JH Colton’s two-part map of Savannah, Georgia and Charleston, South Carolina, was published in 1855. Savannah, Georgia, is on the left and covers the city from Hutchinson’s Island in the East to Milledge St in the west, and Ogeechee Canal in the north to Thunderbolt Road in the South. The map provides a brief description of the city’s history and its founding, and with detailed streets and buildings, the map is hand colored in pink, green, yellow, and blue pastels to identify city wards, which are then referenced in the lower left corner. The maps were published from JH Colton’s William Street Office in New York City, in volume 1 of the first edition of George Woolworth Colton's 1855 Atlas of the World.