In Aragon the institution gradually took shape. Berenger de Palau, Bishop of Barcelona, was busily engaged in organizing it throughout his diocese at the time of his death in 1241, and the vicar, who replaced him while the see was vacant, completed it. In 1242 Pedro Arbalate, who had succeeded Guillen Mongriu as archbishop, with the assistance of Raymond of Pennaforte, held the Council of Tarragona to settle the details of procedure. Under the guidance of so eminent a canonist, the code drawn up by the council showed a thorough knowledge of the principles guiding the Church in its dealings with heretics, and long continued to be referred to as an authority not only in Spain, but in France. At the same time its careful definitions, which render it especially interesting to us, indicate that it was prepared for the instruction of a Church which as yet practically knew nothing of the principles of persecution firmly established elsewhere. It was probably under the impulse derived from these movements that active persecution was resumed at Castelbo, which does not seem to have been purified by the raid of 1237. This time the heretics were not as patient as before, and resorted to poison, with which they succeeded in taking off Fray Ponce de Blanes, or de Espira, the inquisitor, who had made himself peculiarly obnoxious by his vigorous pursuit of heresy for several years. This aroused all the martial instincts of the retired archbishop, Guillen Mongriu, who assembled some troops, besieged and took the castle, burned many of the heretics, and imprisoned the rest for life. An organized effort was made to extend the Inquisition throughout the kingdom, and the parish priests were individually summoned to lend it all the aid in their power. Urgel seems to have been the headquarters of the sectaries, for subsequently we hear of their sharp persecution there by the Dominican inquisitor, Bernardo Travesser, and of his martyrdom by them. As usual, both he and Ponce de Blanes shone forth in miracles, and have remained an object of worship in the Church of Urgel, though in 1262 the latter was translated to Montpellier, where he lies magnificently entombed.[189]