"in the wastes of Pimeria Alta"

Map showing Pimería Alta
Public DomainMap showing Pimería Alta - Credit: Zephyrin Engelhardt
The Pimería Alta ('upper land of the Pimas') was an area of the 18th century Sonora y Sinaloa Province in the Viceroyalty of New Spain, encompassing parts of what are today southern Arizona in the U.S. and northern Sonora in Mexico.

The area was named after the Pima Indians who inhabited the region. The term dates from the late 17th century and was probably christened by the Jesuit missionary Fr. Eusebio Kino. Pimería Alta was the site of  several of the Spanish missions in the Sonoran Desert established by Kino in the late 17th and early 18th centuries.