Interesting map of North America, on the eve of the discoveries of Lewis & Clark.
The map illustrates the limited extent of explorations in the Western United States, predating Lewis & Clark, Humboldt and Pike.
A mythical River of the West flows from to the Straits of Juan de Fuca from the Dakotas.
Interesting oddly configured Alaska and NW Coast of America, based upon Cook and Vancouver's expeditions.
Quivera, Tegauayo and other mythical places shown. Texas and Louisiana Territory are named.