Agua Caliente (Spanish: warm water). A small Shoshonean division on the head waters of San Luis Rey River, South California, forming one linguistic group with the Kawia, Luiseno, and Juaneño. Villages: Gupa and Wilakal. The people of Wilakal are included in Los Coyotes Reservation. By decision of the U. S. Supreme Court the title of the Indians in the other village and in several small Diegueño rancherias, collectively better known as “Warner’s Ranch Indians,” was disproved, and under act of Congress of May 27, 1902, a tract was added to Pala Reservation, and these and neighboring Indians were removed thereto in 19031 . At that time they aggregated about 300.
Ind. Aff. Reps., 1902, 1903 ↩