Fascinating map of the Southwest, at the time of Mexico's independence. California is dominated by pre-Fremont Cartographic features, including a mythical river extending toward Salt Lake. Lake Teguayo is shown, along with an are marked Freye Indianer. Dozens of notes on Indians throughout California, Arizona, Utah, Nevada and Colorado. Excellent details in the Rocky Mountains, based upon Humboldt, Pike and Fremont. Texas is named, but the map shortly predates Austin's Colony. Remarkably, Wheat overlooks this map entirely, although he does note the 1834 United States map. Remarkable early map of the southwest.