Sotomayor’s introduction begins with a long declamation against heretical writers who have ventured to issue, under the names of Catholic authors, pernicious and damnable books; who have interpolated into the text of orthodox writings heretical passages; who have described as untrustworthy the writings of the Fathers of the Church (for instance the treatise of Ambrosius on the Sacraments and the works of Dionysius Areopagita); and who have destroyed great numbers of pious books presenting good Catholic doctrine. The regulations which follow are issued under the general Apostolic authority vested in the inquisitor-general, and under the special authority given by the Brief of the Holy Curia. All copies of works which are specifically condemned by title, or which belong to the classes condemned _in toto_, are to be delivered within ten days to the local inquisitor. Whoever retains books classed as heretical, falls under the _excommunicatio latae_. The retention of other prohibited books brings upon the possessor the penalty of the _excommunicatio ferendae_. In either case, there is a further penalty of a fine of six hundred ducats, and such additional punishments as may be ordered by the Inquisition. The power rests with the inquisitor-general alone of freeing delinquents from these penalties. The sixteen rules contain certain additions to the Regulations of Trent. The writings of Catholics are, for instance, not to be condemned on the ground of containing extracts from the works of heresiarchs cited for the purpose of refutation. In the supervision of books for the purpose of expurgation, care is to be taken not to cancel the names of heresiarchs who are referred to by the authors in connection with necessary refutations. The rules and penalties are similar to those previously in force. The supplement contains an entry permitting, after certain expurgations, the reading of the works of Poza, which by the Roman Congregation had been absolutely condemned.