Rebel defences [sic] of Charleston Harbor, S.C., December 11th, 18[64]

Outlines the harbor of Charleston, S.C., beginning with the convergence of the Ashley and Cooper rivers and continuing to the Atlantic Ocean. Sneden traveled through the harbor on a Confederate steamer on December 11 headed for exchange and gives in this map a detailed picture of the many Confederate forts and batteries along the harbor as well as all types of vessels, especially noting the Union vessels that were awaiting the Confederate steamer on which Sneden was riding. He indicates that the U.S. Monitor fleet backed up the Union exchange boats.