Map of Dunkirk Harbor N.Y. ... / 
Pettes, William H.
Ackerman, J.
N[ew] Y[ork], 
1855.
In: Message from the President of the United States to the Two Houses of Congress at the Commencement of the First Session of the Thirty-Fourth Congress. Part 4.
Map 6 to illustrations accompanying the Report from the Bureau of Topographical Engineers.