Intriguing map based on the map and report of Peter Pond in 1787. The map traces the route from Lake Superior to Lake Winnipeg and then through an interconnected chain of lakes and rivers to Arabaska Lake and Slave Lake. The most interesting feature is the speculative river flowing out of Slave Lake, over falls said to be the largest in the known world, and emptying into Cook Inlet. Pond's map influenced Alexander Mackenzie's quest to find the Northwest Passage via this route in his famous expedition in this region. Published in the March 1790 issue.

References: Hayes, #130; Jolly GENT-283; Kershaw #1159; Wheat [TMW] #222.

Condition: B

Close margins as issued. A small amount of light fold toning and a couple of creases at the bottom, just into neatline.