The tendency of the laws, however, through a period of two hundred years, was to delimit and circumscribe the authority of the Inquisition in matters bordering on the jurisdiction of the civil government. This is seen, especially, in the offense of polygamy, which, up to 1754, was dealt with solely by the Inquisition. By the cédula of March 19th of that year, polygamy was brought under the fuero mixto; [858] the same law ordered that prisoners, after punishment by the inquisitorial tribunal for heresy, should be dealt with by civil judges for an offense against the laws of the realm. On September 7, 1766, this crime was again made punishable solely by the Inquisition, but on August 10, 1788, jurisdiction over cases of polygamy was taken entirely from the Inquisition and given to the royal justices. [859] This may be considered as indicative of the decline of the authority of the Inquisition in the eighteenth century. The inquisitors, of course, were not permitted to exercise jurisdiction over the Chinese, or over the aboriginal inhabitants of the Islands. [860] In its relations with the civil power in the Philippines, and particularly with the audiencia, two charges have been brought against the Inquisition. The first was that in the early years of the Islands' history, it was utilized by the prelates for the more complete usurpation of powers belonging to the civil government and the audiencia. The tribunal, of course, was left entirely without recourse, by virtue of the exemptions and immunities of the Inquisition mentioned above. On July 20, 1585, the audiencia, in a letter to the king, cited several instances in which Bishop Salazar, unwilling to cede his claims to jurisdiction over certain civil offenders, handed them over to the commissary of the Inquisition, instead of surrendering them to the audiencia, to which jurisdiction over such cases belonged. The audiencia, appealing to the king for aid, alleged that the prelate had taken undue advantage of the civil power, "by sheltering himself behind the Inquisition, ... where the audiencia has no jurisdiction." [861] This charge was also brought against Salazar by the Jesuit, Sánchez, in his memorial of 1591. [862] It is significant that no decree was issued during the earlier era which authorized the audiencia to repair the abuses of the inquisitors, although on many occasions the audiencia and the local court of the Inquisition were respectively enjoined to confine themselves to their own particular fields of authority. [863]