Date: May 20, 1863
Description: Map of Hidalgo County, Texas, including the South Texas Plains region. Laguna Madre is marked in blue, as shown on map. The roads to San Patricio, Texas, and from Rio Grande City to Corpus Christi, Texas are marked on map. Scale ca. 1:133,334 (4000 varas per inch).
Contributing Partner: Texas General Land Office