State 7. Date of imprint advanced to January 1, 1781, relief shading darkened in some areas along rivers, tree- and rock-like symbols extended over the interior, and outside border strengthed by alternately doubling the short cross lines.
Appears in The Atlantic Neptune by Des Barres. London, 1777-.
Reproductions available through the Library of Congress site at: http://www.loc.gov/duplicationservices/