Made previous to the reduction by the U.S. Fleet, under the command of flag officer D.G. Farragut, U.S.N. / by the party under the direction of F.H. Gerdes, Asst., U.S. Coast Survey, A.D. Bache, supdt. United States Coast Survey. CREATED/PUBLISHED [Washington, D.C.] : The Survey, [1863?] (Philad[elphi]a : Bowen & Co., Lith.) NOTES Includes note describing positions of Union 'mortar flotilla' on April 18-21, 1862. 'The Forts from data furnished by the Chief Engineer, U.S. Army.' Oriented with north toward the upper left.