Striking map of Texas, Upper California, Mexico and the United States, which distinctly shows a Republic of Texas border.
The map is full of great pre-Fremont cartographic myths, including two Salt Lakes (Timpanagos & Teguayo), several mythical rivers and a single cordillera for the Rocky Mountains. The Upper California missions are named.
Several early placenames in Texas and nice early Rocky Mountain details.
From a scarce work by Duvotenay.