Stephen’s position, in fact, was becoming precarious. To the east was Stephen Dusan the Great, who styled himself Emperor of Servia, Greece, and Bulgaria, and who had shown himself unfriendly since the union of Herzegovina with Bosnia. To the north was Charles Robert, who was preparing to take part in the war. It is true that the Venetians, desirous to keep Hungary away from their Adriatic possessions, were ready to form an alliance with Stephen, but the odds against him were too great. He probably intimated a readiness to submit, for when, in 1339, Benedict sent the Franciscan General Gherardo as legate to Hungary, Charles Robert convoyed him to the Bosnian frontier, where Stephen received him with all honor, and said that he was not averse to extirpating the Cathari, but feared that in case of persecution they would call in Stephen Dusan. If liberally supported by the pope and King of Hungary he would run the risk. In 1340 Benedict promised him the help of all Catholics, and he allowed himself to be converted, an example followed by many of the magnates. It was quite time, for Catholicism had virtually disappeared from Bosnia, where the churches were mostly abandoned and torn down. Gherardo hastened to follow up his advantage by sending missionaries and inquisitors into Bosnia. That there was no place there, however, for the methods of the Inquisition, and that persuasion, not force, was required, is seen by the legends which recount how one of these inquisitors, Fray Juan de Aragon, made numerous converts, after a long and bitter disputation in an heretical assembly, by standing unhurt on a blazing pyre; and how one of his disciples, John, repeated the experience, remaining in the flames while one might chant the Miserere. These miracles, we are told, were very effective, and the stories show that nothing else could have been so. Stephen remained true to his promises, and the Catholic Church commenced to revive. A bull of Clement VI., in 1344, recites that, deceived by the falsehoods of the Franciscan General Gherardo, he had ordered the Bosnian tithes paid over to the friars on the pretext of rebuilding the churches, but on the representation of Laurence, Bishop of Bosnia, that they belonged to him and that he had no other source of support, he is in future to receive them. At the instance of Clement, in 1345, Stephen consented to allow the return of Valentine, Bishop of Makarska, who for twenty years had been an exile from his see, and the next year a third bishopric, that of Duvno, was erected. The Catharan magnates were restless, however, and when Dusan the Great, in 1350, invaded Bosnia many of them joined him, but their prospects became worse when peace followed in 1351, and when, in 1353, shortly before his death, Stephen married his only child to Louis of Hungary, a zealous Catholic who had succeeded his father, Charles Robert, in 1342.[339]