Collection includes holograph anua, bautismos, and reports on the missions of San Ignacío y sus pueblos de visitas at Mayo, Yaqui, Nebome, Chínipas, and Cicibotari. Includes Carta del Padre Diego de Guzmán, 16 de Septiembre de 1629.
Diego de Guzmán was a Jesuit Visitador to the missions in northern Mexico in 1628.