Depths shown by soundings and shading. In lower margin: Drawn by J.H. Adams, draughtsman ; engraved by W. Smith and S.T. Pettit. In upper margin: Harbor map no. Electrotype copy no. 1 by G. Mathiot U.S.C.S. "Verified by A.A. Humphreys, Capt. Topl. Engrs. & assistant." Includes text on sailing directions.