United States Coast Survey. Bache, A. D. (Alexander Dallas), 1806-1867. Harrison, A. M. (Alexander Medina), 1829-1881. cartographic Maps. lcgft https://id.loc.gov/authorities/genreForms/gf2011026387 [S.l.] 1864. eng "No. 391" in upper left corner of map. "Electrotype copy no. 1, by G. Mathiot, U.S.C.S." is printed in the upper margin. Information concerning lighthouses, tides, soundings, and the geographic coordinates of the Capitol dome is given in the lower right corner. Description derived from published bibliography. Scale 1:40,000. LC Civil War Maps (2nd ed.), Nautical charts--Potomac River Estuary. Harbors--Washington (D.C.)--Maps. Washington (D.C.)--Maps. United States Potomac River Estuary. United States Washington. Available also through the Library of Congress web site as raster image. http://hdl.loc.gov/loc.gmd/g3792p.cw0053400