From a reconnaissance made, under direction of Rear Admiral J. A. Dahlgren, Commd'g S.A.B. Squadron, by R. Platt, Act. Master, U.S.N. und [sic] E. Willenbucher, U.S.C.S. 1864. Drawn by Eugene Willenbucher. Bowen & Co., lith., Philada. CREATED/PUBLISHED [Washington, Government Printing Office, 1865] NOTES Scale ca. 1:230,000.