1. A map of America between latitudes 40 and 70 north and longitudes 45 and 180 west, exhibiting Mackenzie's rout from Montreal to Fort Chepewyan & thence to the North Sea in 1789 and to the west Pacific Ocean in 1793 Yale Public content 1800. 2003-03-20T17:04:24Z. 2016-11-29T22:11:59Z. s.n. English. Public. Canada.