Scarce map of North America, published shortly after the Louisiana Purchase and prior to the return of Lewis & Clark from their overland journey to the Northwest.
The map provides a fascinating depiction of the Transmississippi West, with very few mountain ranges and a wishful but elusive search for a simple watercourse from the Missouri to the Pacific, with hints of short portages in across relatively minor Pacific Coastal Ranges. One of the map's most interesting featuresis the conjecturalized course of the Missouri River, meeting up with a mythical set of rivers to the north, which appear to connect to the Arctic Sea and nearly connect to the Pacific.
The map is rich with Indian detail in both the Transmississippi West and the Missouri and Mississippi Valleys. The discoveries of the Hudson Bay Company and the trading houses established in the late 18th and early 19th Centuries are much better documented, with dates of exploration, dozens of trading houses located and other notes. The map includes nice post-Vancouver, post-La Perouse information along the Northwest and California Coastlines.
The map provides a finely detailed look at North America on the eve of the the report of Humboldt and the discoveries of Lewis & Clark and Zebullon Pike.