So long as these Ghibelline chiefs retained power it was evident that the foothold of heresy was secure, and that the hopes based on the death of Frederic II. were not destined to fruition. Every motive had long conspired to render the Church eager for the destruction of Ezzelin, who was its most dreaded antagonist, and every expedient had been tried to reduce him to subjection. As far back as 1221 Gregory IX., then legate in Lombardy, had extorted from him assurances of his hatred of heresy. In 1231 his sons, Ezzelin and Alberico, were at the papal court expressing horror at his crimes and promising to deliver him up for trial as a heretic if he would not reform, in order to escape the disinheritance which they would otherwise incur under Frederic’s laws. They pledged themselves, moreover, to deliver to him letters from Gregory, dated September 1, in which he was bitterly reproached for his protection of heretics, and told that if he would humbly acknowledge his errors and expel all heretics from his lands he might come within two months to the Holy See, prepared to obey implicitly all commands laid upon him; otherwise heaven and earth would be invoked against him, his lands should be abandoned to seizure, and he, who was already a scandal and a horror to men, should become an eternal opprobrium.[249] Whether the sons dutifully presented to their father this portentous epistle does not appear, nor is it of any importance save as showing how Ezzelin was already regarded as the mainstay of heresy, and how habitually zeal for the faith was made to cover the ambitious political designs of the Church. Ezzelin’s courage never wavered, and his adventurous career was pursued with scarce a check. When Frederic II. overcame the resistance of Lombardy, he gave, in 1238, his natural daughter Selvaggia to Ezzelin in marriage and created him imperial vicar. The unanimous testimony of the ecclesiastical chroniclers represents him as a monster whose crimes almost transcend the capacity for evil of human nature, but the unrelieved blackness of the picture defeats the object of the painter. Possibly he may have been among the worst of the Italian despots of the time, when faithlessness and contempt for human suffering were the rule, but the long unbroken success which attended him shows that he must have had qualities which attached men to him, and the report that he was twice moved to tears by the eloquence of Frà Giovanni Schio indicates a degree of sensibility impossible in one utterly depraved. In fact, the anecdote related by Benvenuto da Imola, that he carried on his back his sister’s lover Sordello to and from the place of assignation, and then gave the frightened troubadour a friendly warning, presupposes a character wholly at variance with that currently attributed to him. Some of the stories circulated to excite odium against him are so absurdly exaggerated as to cast doubt upon all the accusations of the papalist writers.[250]