Northern Hemisphere 1816 Thomson map Mts. of Moon in Africa explorer tracksNorthern Hemisphere Projected on the Plane of the Horizon of London. (North America, South America, Europe, Africa, Asia, North Pole). Issued Edinburgh, 1816 by Thomson. Lovely early 19th century antique engraved map with original outline hand color. Of note for the prominent huge unbroken chain of mountains depicted cutting across the entire middle interior, naming the apocryphal Mountains of the Moon and the supposed course of the Niger river.