In September 1872, Cochise negotiated a reservation for his people from the Dragoon Mountains on the west to the Peloncillo Mountains on the east. It included the Chiricahua Mountains and ran south to the Mexican border. Some members of the tribe continued raiding into the Mexican states Sonora and Chihuahua. Governor Pesqueira of Sonora complained bitterly about the raids, and General Crook tried to figure out how to force the relocation of the raiders to the San Carlos Reservation. Thomas J. Jeffords, who was Indian Agent to the reservation, lost influence when Cochise died on June 8, 1874.