1. B no. 2 sketch of Buttermilk Channel, New York Harbor Yale Public content 1849. 2013-07-17T18:51:31Z. 2013-08-22T14:08:29Z. United States Coast Survey, issuing body. U.S. Coast Survey. English. Public. New York Harbor (N.Y. and N.J.), New York (State), New York, and Governors Island (New York County).