Concerns problems around Valle de San Buenaventura where Yaquis have been resettled; many comments on Yaqui missions; Yaquis' role in mining; use of Seris in mining; conditions of Indian communities; problems of forced labor; need to rapidly resolve situation in Valley; stresses importance of Indian settlers in defense and fact that Yaquis cannot support themselves in region, due to its lack of mines (J. Williams, may 1987)