The following maps of the region are from the collections of the Geography and Map Division of the Library of Congress.
KEYS: Descriptive Record Enlarge Image
Sketch of Texas with the boundaries of Mexican States as shown on General Austin's map of Texas published by R. S. Tanner, 1839.
Boundary between the United States and Mexico, 1855. Emory, William H. (William Hemsley), 1811-1887.
Boundaries between Brownsville, Texas and Matamoros, Tampaulipas (Mexico), 1910. International Boundary Commission, United States & Mexico. Rio Grande between Matamoros, Tamaulipas showing monument on the Railroad Bridge.