Map of the Republic of Texas at its largest extent. Published in The London Atlas of Universal Geography, this edition of Arrowsmith's southwestern United States, Texas, and Mexico shows the independent Republic of Texas in the Emory configuration, with its southern and western borders touching the Rio Grande (R. Bravo del Norte). Very few Texas settlements are listed; Houston is not among them, though Harrisburg, S. Antonio de Bexar, S. Felipe de Austin, Nacogdoch, and Brazoria are.

Texas's border follows the 100th parallel to the Arkansas River. In Upper (or New) California, there is an American Fur Co. Depot on the eastern shore of Youta, or the Great Salt Lake. In New Mexico, the Great Spanish Road stretches from the Red River on the Texas boundary to Santa Fe, and then heads south through the length of Mexico. A large inset depicts central Mexico, centered on Mexico City and showing the ports of Acapulco, Vera Cruz, and Tampico.