U.S. Government, Superintendent of the Coast Survey. 1851.
Map, folded as issued, 23 x 18 1/2 inches, light toning at folds, a few creases. Shows New York Bay to the north and Delaware Bay to the south and the Delaware River including light houses. Complete title: Sketch B No. 3 Showing the Triangulation & Geographical Position in Section No. II From New York City to Cape Henlopen. Item #31981