Three messages from Manuel de Iturbe with rules for people who own or operate salt deposits. The multitude of signatures on the documents show acknowledgments from local Spanish officials that they received and passed on the correspondence. The last document appears to be a message from Viceroy Iturrigaray, promulgated by Governor Manuel de Iturbe.

Message from Viceroy José de Iturrigaray saying that Juan José Pinto is in charge of the Real Asiento de Alumbres for five years. Also included is a letter from Governor Iturbe sent to towns across Mexico, and signed by Spanish officials in those towns acknowledging their having received the correspondence.