S. D. Trenchard ;A. M. (Alexander Medina) Harrison, 1829-1881 ;A. W. Evans, Lieutenant. ;A. D. (Alexander Dallas) Bache, 1806-1867
United States Coast Survey. "Preliminary chart of St. John's River, Florida : from Brown's Creek to Jacksonville." Washington, D.C.? : U.S. Coast Survey, 1856. Allen Lastinger Center for Florida Histo..
United States Coast Survey. "Preliminary chart of St. John's River, Florida : from Brown's Creek to Jacksonville." Washington, D.C.? : U.S. Coast Survey, 1856. Allen Lastinger Center for Florida History. Thomas G. Carpenter Library, University of North Florida. UNF Digital Commons,