Federico García y Alva published “Sonora Histórico” for the government of Ramón Corral (1895-1899), and the 65-page document outlined Sonora’s ancient past through the 1897 peace treaty with the Yaqui tribe. The document has been translated by Errol Zimmerman, who gave this presentation to the History Association on Nov. 3 (Part 1) and Jan. 5 (Part 2).