Map of the South Texas Plains region covering Encinal County, Texas. The roads from Laredo to Rio Grande City and from Laredo to Corpus Christi, Texas are marked on map. Scale ca. 1:133,334 (4000 varas per inch).
Cadastral map of Webb County, Texas in the South Texas Plains region. Some features are marked in color and some sketched illustrations around the title. Scale ca. 1:133,334 (4000 varas per inch). Authorship is attributed to W.S. Porter, later known as the short story writer O. Henry.