that Gonsalvo de Gonsalvo Royz was concerned in procuring the bull for the Conversos: he is therefore to be arrested at once and is not to be released without a royal order, while Luis de Santangel, the royal _escribano de racion_, will convey orally the king's intentions concerning him.[617] In this elaborate and carefully planned decree Sixtus formally threw down the gage of battle to Ferdinand and announced that he must be placated in some way if the Inquisition of Aragon was to be allowed to perform its intended functions. That it was simply a tactical move--rendered doubly advantageous by liberal Converso payment--and that he is to be credited with no humanitarian motives, is sufficiently evident from his subsequent action and also from the fact that the bull was limited to Aragon and in no way interfered with the Castilian tribunals. Ferdinand promptly accepted the challenge. He did not await the publication of the bull but addressed, on May 13th, a haughty and imperative letter to Sixtus. He had heard, he said, that such concessions had been made, which he briefly condensed in a manner to show that his information was accurate, and further that the inquisitors Gualbes and Orts had been removed, at the instance of the New Christians who hoped for more pliable successors. He refused to believe that the pope could have made grants so at variance with his duty but, if he had thus yielded to the cunning persuasions of the New Christians, he, the king, did not intend ever to allow them to take effect. If anything had been conceded it must be revoked; the management of the Inquisition must be left to him; he must have the appointment of the inquisitors, as only through his favor could they adequately perform their functions; it was through lack of this royal power that they had hitherto been corrupted and had allowed heresy to spread. He therefore asked Sixtus to confirm Gualbes and Orts and the commission to Gaspar Juglar, or to give a similar commission to some other Dominican, for he would permit no one to exercise the office in his dominions except at his pleasure.[618]