State 4. Contains additional relief shading along the coast and river banks, several new stippled banks and shoals, and a broken line between Cape Cod and Martha's Vineyard to show the route of H.M.S. Eagle in September 1778.
From the author's Atlantic Neptune. London : [J.F.W. Des Barres], 1777-.
Reproductions available through the Library of Congress site at: http://www.loc.gov/duplicationservices/