Map of Dunkirk Harbor, showing the works erected by the United States and the plan of those projected for its further Improvement; together with the changes of outline of shore caused by their erection up to Sept. 30th 1838. Copied in part from Lt. T,S. B1838]From Annual Report 1838 W.G. Williams, Capt. U.S. Topo. Engs.W.J. Stone Sc. Wash.cartographic