The heart of the work centers on the early nineteenth century. It explores subjects such as the constant threat posed by hostile Apaches, government intrigue and revolution in Sonora and the provincias internas, and patterns of land ownership in villages such as Tucson and Tubac. Also covered are the origins of land grants in present-day southern Arizona and the invasion of southern Arizona by American "49ers" as seen from the Mexican point of view. Officer traces kinship ties of several elite families who ruled the frontier province over many generations-men and women whose descendants remain influential in Sonora and Arizona today.