Letters concerning: brief reports of significant monthly military occurrences, mining discoveries; organization of presidios to counter Indian attacks, punish offenders; 'librettas' of officials, 'revista de inspeccion' for 1769, 1770; 'renuncia' of alferez, suffering from poor health; discussion of use of word 'previniendole' with 'subditos,' assault case in which soldier held 'bajo' word, governor explains rationale for action to virrey, begs indulgence for applying word in this manner; subsequent letter that further action delayed because squadron called upon to suppress Indian attacks; transportation of individuals via 'pobladores mercenados'; new mines and veins discovered at Vallecillo, abundance of metals still in old mines. (L. Kerr, November 1988)