Republic of Texas!
Rare separately issued folding of North America, which was extensively used by an early traveler in Texas, California, the Rocky Mountains, Northwest, etc.
The basic cartography for the map shows the West shortly after Texas Independence. Upper California and New Mexico are still separate provinces of Mexico and the mid-continent is dominated by Indian Districts, including Ozark District, Osage District, Mandan District, Sioux District and Huron District.
The District of Oregon, with a 54-40 or fight northern border, is shown. Throughout the west, Dufour includes the best obtainable cartographic information.
The information included in the annotations includes the Annexation of California, New Mexico and Utah (a curious addition). Routes are traced through Texas, the Rocky Mountains, etc.
The table in the top left corner is focused on population and size facts regarding England's Canadian Colonies.