(AMERICAS.) John Senex. A New Map of America From the latest Observations. Double-page engraved map of the Western Hemisphere with several interesting cartographic anomalies including California as an Island, a large fictional "Great Lake of Thoago" in western Canada, and a massive river extending into Carolina from the Gulf of Mexico. 19½x22¼ inches sheet size, ample margins; original hand-color in outline; age toned with small stains, would benefit from cleaning. With: a typed letter from Ann Silbaugh at Goodspeed's Book Shop to the map's early owner in 1938. London, 1719