Concerns military problems caused by a force of rebels made up of Apostate Indians and renegades menacing Valle de San Bartholome; includes many interesting details on rebels use of spies; size and organization of their forces (more than 1700 men); ethnic composition and origins of members of their group; their leader (Calaxtrin);their tactics and strategy; their capture and conversion of other Tarahumar Indians, including women; their arms and equipment; importance of criminals in the group; their use of Peyote to persuade captives to join rebellion; rebel bases in mountains; their use of captured livestock for meat; their commerce with barbarian Indians for arrows and hides; use of auxiliaries against rebels; population losses resulting from rebel raids; an exploration of rebels home in San Francisco mountains by balenzeula; recent presidio transfers and resulting strategic situation; recognition that rebel Tarahumaras are a serious threat to province; and viceroy's insistence on importance of new presidio line. (J. Williams, March 1987)