The lack of transportation facilities has been partly relieved by the construction of a branch of the Southern Pacific (American) from Nogales southward to Guaymas and the Sinaloa frontier, from which it has been extended to Mazatlan.
Near the end of the century Sonora and Sinaloa were divided into two districts, in 1767 the Jesuit missions were secularized, in 1779 the government of the province was definitely organized by Caballero de Croix, and in 1783 Arizpe became the provincial capital.
These converge in southern Sinaloa and Durango to form the Sierra de Nayarit.
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