Note 9 — THE PHYSICAL SURVEY OF NEW YORK HARBOR AND ITS APPROACHES.
Reading edition
Report of the Observations for the Completion of the Physical Survey of New York Bar and Harbor, in pursuance of the Act of the Legislature of New York, April 17, 1857, and of the authority of the Commissioners on Harbor Encroachments. By A. D. Bache, Supt. U.S. Coast Survey.