Correspondence, telegrams, transcripts, and other documentation created and/or collected between the years 1923-1949, pertaining to relations between the Palm Springs Chamber of Commerce and the Agua Caliente Band of Mission Indians. Notable events recorded include the attempts of the Chamber of Commerce to seize control of the Indian Canyons and Agua Caliente Hot Spring on Section 14, the Indian Affairs Committee's demand for retraction of Indian Canyons entrance and horse riding fees, the arrest of the Agua Caliente Band's traditional leaders, the 1937 federal takeover of the Agua Caliente Indian Reservation, and other topics pertaining to tribal land rights and sovereignty.