As an additional inducement to crusaders they were, moreover, released from earthly as well as heavenly justice, by being classed with clerks and subjected only to spiritual jurisdiction. When accused, the ecclesiastical judge was directed to take them from the secular courts by the use of excommunication, if necessary, and when found guilty of enormous crime, such as murder, they were merely divested of the cross, and punished with the same leniency as ecclesiastics. This became embodied in secular jurisprudence, and its attraction to the reckless adventurers who formed so large a portion of the papal armies is readily conceivable. When, in 1246, those who had taken the cross in France were indulging themselves in robbery, murder, and rape, St. Louis was obliged to appeal to Innocent IV., and the pope responded by instructing his legate that such malefactors were not to be protected.[33] Still further rewards were offered when personal ambition and vindictiveness were to be gratified in the crusade preached by Innocent IV. against the Emperor Conrad IV., after the death of Frederic II., when he granted a larger remission of sins than for the voyage to the Holy Land, and included the father and mother of the crusader as beneficiaries in the assurance of heaven. A profitable device had also been introduced by which crusaders, unwilling or unable to perform their vow, were absolved from it on a money payment proportioned to their ability, and very large sums were raised in this manner, which were expended, nominally at least, for the furtherance of the holy cause. The development of the system continued until it came to be employed in the pettiest private quarrels of the popes as masters of the patrimony of St. Peter. If Alexander IV. could use it successfully against Eccelin da Romano, the next century saw John XXII. have recourse to it, not only in making war against a formidable antagonist like Matteo Visconti or the Marquis of Montefeltre, but even when he wished to reduce the rebellious citizens of little places like Osimo and Recanati, in the March of Ancona, or the turbulent people of Rome itself. The ingenious method of granting indulgences to those who took the cross, and then releasing them from service for a sum of money, had become too cumbrous, and the purchase of salvation simplified itself into a direct payment, so that John was able to raise funds for his private wars by thus distributing the treasures of salvation over Christendom, and ordering the prelates everywhere to establish coffers in the churches by which the pious could help the Church while they saved their souls. The prelates who saw with regret the coins of their parishioners disappear into the never-satisfied maelstrom of the Holy See, in vain endeavored to resist. They were no longer independent, and the slender barriers which they sought to erect were easily swept away.[34]