In France, during the thirteenth century, the liability continued. In 1239 a knight of Orleans, Gui de Santillac, testified before the royal council that the chapter of Saint-Aignan had appealed him in wager of battle.[486] As late as the year 1245, some vassals of the chapter of Nôtre Dame at Paris denied the service due by them, and demanded that the claim of the chapter should be made good by the wager of battle. That they had a legal right to do so is shown by the fact that the churchmen were obliged to implore the intervention of the pope; and Innocent IV. accordingly granted to the chapter a special privilege, in which, on the ground that single combats were forbidden by the canons, he declared that the church of Nôtre Dame should be entitled to prove its rights by witnesses, deeds, and other legitimate proofs, notwithstanding the custom existing to the contrary.[487] It was probably his interference in this case that led him a few years later, in 1252, to issue a decretal in which he pointed out the manifest hardship of forcing the clergy in France, when prosecuting such claims against their serfs, to have recourse to the duel, and thus, under the canon law, to forfeit their positions. To remedy this he proclaimed as a general rule that all verdicts should be void when obtained against clerks either by means of the duel or through reason of their refusing the combat;[488] yet in the following year he was obliged to intervene to protect the Archbishop of Sens, who complained that in these cases he was obliged to make good his claims by battle.[489] In this, Innocent was consistent, for one of the accusations which he had brought against the Emperor Frederic II. when the latter was deposed at the Council of Lyons in 1245 was that he had forced ecclesiastics to undergo the duel, to the confusion of all distinctions between clerk and layman.[490] Even in Italy about 1220 the podestà of Florence ordered the duel to decide a suit concerning certain property between some citizens and the church of the Apostles; the latter invoked the intervention of Honorius III., who commanded the matter to be settled by regular judicial process, boldly alleging that the duel was unheard of in such matters,[491] but in spite of this and the repeated prohibitions of the popes, trial by combat was still towards the close of the thirteenth century regarded as the only mode of settling disputed questions between churches when the genuineness of a charter was impugned.[492] Yet at the same period the doctors of canon law held that an ecclesiastic appearing in the lists, either personally or by a champion, was subject to deposition; it was better, they said, to lose lands and fiefs than to incur mortal sin. Unfortunately this was scarce more than a mere _brutum fulmen_, for a dispensation could always be had from bishop or pope.[493] Custom was stubborn, moreover, and half a century later, when the judicial duel was going out of fashion,