A very detailed report providing information about nature of defense and economy of province of Sonora, largely as it related to implementation of royal regulation of 1772; includes information about subjects such as; presidio relocations; site selection; campaigns of Vildosola; battles at Tecoripa; battles at Bisanic; mission Indian alliance with barbarians; Cerro Prieto campaigns; peace negotiations; hardship caused by wars; fertility of region; progress of missions; present ruin of missions due to wars; Mineral richness of province; commerce; presidio Inspections; combat capability of troops stationed in province; daily duties of presidials; scouts; raids on various missions; troop assignments; proposals of troop assignments; corrections to Lafora map; auxiliaries (Indians and civilian); opening of a route to California; proposals to found missions and presidios along northern frontier; Bonilla includes two tables of alternate troop assignments in new defensive line; many significant references to future Yuma settlements. Taken together a document of extreme importance to history of Sonora. (J. Williams, April 1987)