Nonetheless, the Cortes voted for a modest subsidy, not without complaint. According to chronicler Ruy de Pina, Edward 'forgot' to summon the dissenting brothers – Peter of Coimbra, John of Reguengos, and Afonso of Barcelos – to the Evora parliament. So the three were invited to the king's court in Leiria in August to submit their votes. Although they were warned by the king that their vote was immaterial, that the project was going forward regardless, all three nonetheless insisted on registering their vote against it. Papal bulls In the meantime, Henry the Navigator had been busy lobbying the pope to endorse the expedition. This bore fruit in September, when Pope Eugenius IV issued the bull Rex Regnum blessing the Tangiers enterprise with the privileges of a crusade. However this was not issued without misgivings. Pope Eugenius IV requested learned opinions on the legality of Henry's war of conquest in Muslim Morocco. The legal opinions, delivered between August and October, notably the reports by Bologna jurists Antonio Minucci da Pratoveccio and Antonio de Rosellis, deeply doubted the jus bellum foundations of the expedition. However, another of Henry's side-projects nearly sunk the whole enterprise. The same month (September), Pope Eugenius IV issued another bull at Henry's request, Romanus Pontifex, granting Portugal the right to subjugate the unconquered part of the Canary Islands. This bold intrusion roused the Crown of Castile, who had long laid claim to the islands, and was still in the process of conquering them. The Castilian prelate Alfonso de Cartagena, Bishop of Burgos, then attending the Council of Basel, launched a legal offensive, supplying volumes of documents proving that all of the Canaries rightfully belonged to Castile. Recognizing that he had been misled by Henry, Pope Eugenius IV withdrew the Canaries bull that November. Alfonso de Cartagena was not done. Eager to punish Henry for his impertinence, the Castilian diplomat submitted more claims – urging the pope to restore several Portuguese bishoprics back under Compostela's jurisdiction, to revoke the autonomy of the Portuguese military orders (and fold them under the Castilian orders), to revoke the Tangier bull in light of Castile's 'right of conquest' over Morocco and even demanding the handover of Ceuta as rightfully Castilian (a point that had never been raised before). While it is probable that Cartagena was only half-serious, and sought merely to rattle Henry, the sudden splurge of Castilian claims nearly sank the