Scale ca. 1:650,000. Prime meridian: Philadelphia. Inscribed "To the American Philosophical Society." Hand colored. LC copy imperfect: Deteriorated along folds. LC Maps of North America, 1750-1789, 1376 Available also through the Library of Congress Web site as a raster image. col. map 57 x 43 cm.
Scale ca. 1:770,000. LC copy annotated in black ink. Prime meridian: Philadelphia and London. Relief shown pictorially. "Engraved for Carey's American edition of Guthrie's Geography improved." Inset: Continuation of the Potowmac River, from Fort Cumberland. Available also through the Library of Congress Web site as a raster image. map 29 x 43 cm.