General Map of Charleston Harbor South Carolina Showing Rebel Defences and
Obstructions. Prepared by C. O. Boutelle and drawn by E. Willenbrucher. This
map was prepared following the fall of Charleston. Note that "This torpedo
exploded under U.S. Steamer BIBB March 16, 1865" off of Fort Moultrie. The BIBB
was a Coast Survey ship attached to the South Atlantic Blockading Squadron.