This interesting map focuses on the explorations by Lewis and Clarke, William Parry, and John Franklin and gives good detail of the river systems and topography, with notations scattered throughout the map. The cartography is based on maps by Buchon and Le Sage, as credited in the title cartouche. There is practically no interior detail except in Canada, where there appears several fur trading forts. The British, Danish, and Russian possessions are color-coded, and the British possessions are further listed in a table at bottom right.
References: Phillips (Atlases) #127-21a.
A crisp impression and contemporary color on a bright, sturdy sheet with the watermark of a crescent moon with a face. There is a hint of toning along the centerfold, otherwise fine.