Correspondence, reports, financial documents, records of marriages and baptisms, decrees and other official documents, and assorted materials pertaining to the history of Janos and the military and civilian persons within its jurisdiction, including the Apaches and other Indians; and to administration of the presidio.

Correspondence includes letters of Juan Gutiérrez de la Cueva, José Antonio Rengel, Pedro de Nava, Diego de Borica, Teodoro Caballero de Croix, Antonio Bonilla, Juan Bautista Perú, Narciso de Tapia, Hugo Oconor, Jacobo Ugarte y Loyola, Antonio Cordero y Bustamente, Pedro de Mata Biñolas, Antonio Narbona, Nicolás de Almanza, Nemesio Salcedo, Simón El'as González, José Mar'a de Tovar, José Ronquillo, Cristóbal Dom'nguez, Francisco Garc'a Conde, and Roque de Medina. Also included are official circular letters.

Reports pertain to reviews of the troops, equipment, and supplies; issuance of rations; Indians living in the peace establishment; criminals imprisoned at the presidio; and military encounters and other events. Financial documents include both presidio and individual accounts of income and expenses. Among the assorted documents are instructions and orders, regulations, inventories of military and church properties, diaries, records of military service, censuses, and lists of school students.

The physical extent of the records is nine linear feet. The materials are in Spanish; their bulk dates are 1706-1858. The records have been partially microfilmed. This document is a partial calendar of documents dated 1707-1828, and is also available in Rare Books Reference.