Depths shown by soundings in feet.
Chart includes Old South Shoal and New South Shoal.
Includes bearings, distances, tides and tidal currents, and bottom types.
"Position determined by the hydrographic party under the command of Chas. H. Davis, Lieutenant, U.S. Navy."
"Outline of Nantucket from map of William Mitchell, Esq. of Nantucket."