"A Map of the New Continent According to Its Greatest Diametrical Length from the River la Plata to Beyond the Lake of the Assiniboils", Gibson, John

This map presents a very interesting, if somewhat peculiar projection, with north oriented to the top right. A long Northwest Passage, consisting of a system of rivers and lakes, reaches across from the Great Lakes towards the Pacific Ocean. The northwestern part of North America is otherwise left blank. A most decorative rococo cartouche adorns the scientific-looking map. Published in the December 1758 issue of Gentleman's Magazine.

References: Jolly #GENT-122.

Condition: B+

Issued folding on a bright sheet of watermarked paper with a couple of small stains in the title cartouche.