Concerns condition of presidios of Nueva Vizcaya; notes visit of bishop to various places; provincial depopulation; geography; livestock; vegetation; daily life of soldiers; detachments of los Alamos and Mapimi; private armed forces and civil militia; distances between presidios; troop strengths, arms and equipment and fiscal administration. Bishop urges that frontier cavalry be converted into infantry to increase number of fighting men available and advocates formation of new presidios. Tamaron's reflections on war provide many important insights into presidial defense casting special light on pre-1772 reglamento period. (J. Williams, may 1987)