General index of expedientes from the province of Sonora from 1730-1793. Chronological list of expedientes concerning varied topics. More information and richer detail for last twenty years Tepocas, discovery of 'Camino' to peninsula of Californias, comercio, mining, government administration, governing of Sinaloa and Nueva Vizcaya, budget of presidio of Santa Rosa, expedicion of Sonora, Placeres of gold, archbishopric of Durango, mines of real del Rosario, expenses from administration of Yuma Indians. Many references made to presidios. Not much information given on any one topic but good reference for general affairs of Sonora. (J. Acheson, December 1988)