The
Mexican Inquisition, usually working under the
direction of the Spanish Inquisition, fortified the
effort to censor books within Spain’s overseas
dominions by printing official proclamations that
served as updates to the Spanish Index
librorumprohibitorum and the Indexlibrorumexpurgatorum. Most often
published as single-sheet broadsides bearing the
official seals and signatures of the ecclesiastical
authorities, these decrees warned that violators of
censorship laws were subject to excommunication.