Documents concern appointment of Blanco as interim governor of Nuevo Santander for ailing conde de Sierragordo, then as permanent governor upon Sierragordo's death. Includes documents referring to precedent and procedure of temporary appointment of military officials to political positions and their posting of Media anata. Discussion of Blanco's duties include option to pursue either a policy of reduccion or extermination of the tamanlipas Indians and his need for auxiliary military forces to carry out that decision. (G. Lavalley, June 1987)