The Yucatecan Letters consist of manuscript correspondence (960 letters) received by the Captaincy General of Yucatán after 1778, and after independence, by the Commandant General of Arms for the State of Yucatán. The majority, destined for Mérida, come from Campeche, Sisal, and Bacalar, with a few from Veracruz, Habana, Madrid, Cádiz, and from within Mérida. The writers are most often the ranking officers at the various outposts under the command of the Captain General. More than 230 letters date from the year 1797, and over 400 from between 1810 and 1815, the period connected with the first movement for Mexican independence. Topically, the manuscripts may be grouped into three broad areas: economic, military, and legal affairs.