Diaz considers various proposals related to founding of a presidio and mission on Colorado River at Yuma villages; includes references to; new establishments in California; new lines of communication; Anza's expedition; lack of Apache threat in Yuma country; possible expenses caused by a new presidio there; Diaz notes of military importance of mission auxiliaries y estos Tan adelantados en el manejo de las Armas, y industrias de la guerra; que juzgo indispensable aumentar la Tropa en Sus fronteras; he recognizes Apache's diligence in war; necessity of having strong detachments; detachment of men from Buenavista at Suaqui; of another force from same presidio at Pitiqui; a detachment from Altar at Caborca; value and combat ability of troops; problems created by presidial relocation; number of men deployed elsewhere in province; list of reasons to support relocations; Bucareli acknowledges receipt of Diaz's points. (J. Williams, April 1987).