O'Reilly's regulations and instructions called for the recordation of the various "decrees, royal provisions, and dispatches, which may be addressed to the corporation either by the governor or other authorized minister," and for the preservation of the originals in the archives of the Cabildo. The original manuscript documents have been bound into three volumes. A detailed inventory of these documents appears in the 1845 "Inventory of the archives," made by the secretary of the general council.

Researchers should view the combined inventory of the letters, petitions, and decrees from the Cabildo, Conseil Muncipal, and Conseil de Ville (1770-1835) for more information about about these volumes.