Correspondence from Henry S. Field to Captain Hamilton K. Redway on December 20, 1864 requesting assistance in the substitution of Private William Thompson's son, Abel Thompson, in his place. In this letter, Field states that Private Thompson is afflicted with an organic disease of the heart. Field strongly recommends the substitution of Private Thompson's son, Abel Thompson, who is seventeen years of age.

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).