Depths shown by soundings.
British squadron represented pictorially.
Inset: Plan of the platform in Sulivans Fort, by Lt. Colonel Thos. James of the Rl. Rt. of Artillery.
Scale ca. 1:26,200.
LC Maps of North America, 1750-1789 1545
Guthorn, P.J. Brit. maps 66-4
See case file for transparency.