Gammel, comp., The Laws of Texas 1822-1897, vol. 5, pp. 455-464; Texas State Militia Muster Rolls (RG 401), File 494, Texas State Archives, Austin. Those who did not have to serve in the militia included postmasters and mail carriers, ferrymen on public roads, railroad engineers and conductors, steamboat officers and crews, district judges and district clerks, and county clerks, chief justices, and sheriffs.