From a trigonometrical survey under the direction of A. D. Bache, Superintendent of the survey of the coast of the United States. Triangulation, topography and hydrography by the parties under the direction of C. O. Boutelle, Assist., Coast Survey. Drawn by E. Willenbucher. Chas. G. Krebs, lith. CREATED/PUBLISHED [Washington, U.S. Coast Survey], 1862. NOTES Scale 1:20,000. 'The triangulation was executed in 1852; the topography and hydrography were executed in 1862.' General chart showing soundings and bottom contours. Includes sailing directions.