founded upon a trigonometrical survey under the direction of A.D. Bache Superintendent of the Survey of the Coast of the United States ; triangulation by C. M. Eakin ; topography by H. L. Whiting ; hydrography by the part under the command of G.S. Blake
Relief shown by hachures. Depth shown by soundings.
At head of title: harbor of refuge no.
In upper margin: Harbor map no. -- Electrotype copy no. 1 by G. Mathiot U.S.C.S.
Includes notes.