Even after the efforts of Innocent III. to abolish the ordeal, and while the canons of the Council of Lateran were still fresh, St. Francis of Assisi, in 1219, offered himself to the flames for the propagation of the faith. In his missionary trip to the East, finding the Soldan deaf to his proselyting eloquence, he proposed to test the truth of their respective religions by entering a blazing pile in company with some imams, who naturally declined the perilous experiment. Nothing daunted, the enthusiastic saint then said that he would traverse the flames alone if the Soldan would bind himself, in the event of a triumphant result, to embrace the Christian religion and to force his subjects to follow the example. The Turk, more wary than the Dane whom Poppo converted, declined the proposition, and St. Francis returned from his useless voyage unharmed.[979] In this St. Francis endeavored unsuccessfully to emulate the glorious achievement of Boniface, the Apostle of Russia, who, according to the current martyrologies, converted the King of Russia to the true faith by means of such a bargain and ordeal.[980] It is a little curious that Peter Cantor, in his diatribe against the judgment of God, presents the supposition of a trial such as this as an unanswerable argument against the system—the Church, he says, could not assent to such an experiment, and therefore it ought not to be trusted in affairs of less magnitude.[981] Somewhat irregular as a judicial proceeding, but yet illustrating the general belief in the principles of the ordeal of fire, was an occurrence related about the year 1220 by Cæsarius of Heisterbach as having taken place a few years before in Arras. An ecclesiastic of good repute decoyed a goldsmith into his house, and murdered him to obtain possession of some valuables, cutting up the body, with the assistance of a younger sister, and hiding the members in a drain. The crime was proved upon them, and both were condemned to the stake. On the way to the place of punishment, the girl demanded a confessor, and confessed her sins with full contrition, but the brother was obdurate and impenitent. Both were tied to the same stake; the brother was promptly reduced to ashes, while the flames were deliciously cool to the sister, and only burnt the rope with which she was tied, so that she quietly walked down from the pile. The judges, thus convinced of her innocence, dismissed her without further trouble.[982]