Also covers Lewis Bay. Relief shown by landform drawings. Depths shown by soundings and contours. "Harbor map no."--Upper left margin. "Electroptype Copy No. 1 by G. Mathiot U.S.C.S."--Upper right margin. "Reduction by Wm. Luce, Draughtsman. Engraved by Sherman & Smith, N.Y. Sailing directions &c. by W. Smith, U.S.C.S."--Lower margin. Includes 2 views of entrances to the harbor as seen from the ocean.