Relief shown by hachures; depths shown by soundings, shading, and isolines. "Verified by A.A. Humphreys, lieut. topl. engrs. & assistant." "Republished ... with additions." In upper margin: Harbor map no. " In lower margin: Final reduction for engraving by J.B. Glück, draughtsman. Engraved by J.V.N. Throop, Washington, D.C. and corrected at the Coast Survey Office. Longitude given at Stonington Light House.