organization it developed such abundant promise of usefulness in bringing the secular laws to bear upon heresy that means were sought to give it a fixed organization which should render it still more efficient in its functions both of detection and punishment. The death of Frederic II., in 1250, in removing the principal antagonist of the papacy, offered the opportunity of giving practical enforcement to his edicts, and accordingly. May 15, 1252, Innocently. issued to all the potentates and rulers of Italy his famous bull, Ad extirjpanda, a carefully considered and elaborate law which should establish machinery for systematic persecution as an integral part of the social edifice in every city and every state, though the uncertain way in which bishop, inquisitor, and friar are alternately referred to in it shows how indefinite were still their respective relations and duties in the matter. All rulers were ordered in public assembly to put heretics to the ban, as though they were sorcerers. Any one finding a heretic could seize him, and take possession of his goods. Each chief magistrate, within three days after assuming office, was to appoint, on the nomination of his bishop and of two friars of each of the Mendicant Orders, twelve good Catholics with two notaries and two or more servitors whose sole business was to arrest heretics, seize their goods, and deliver them to the bishop or his vicars. Their wages and expenses were to be defrayed by the State, their evidence was receivable without oaths, and no testimony was good against the concurrent statement of any three of them. They held office for six months, to be reappointed or replaced then, or at any time, on demand of the bishop and friars; they were entitled to one third of the proceeds of all fines and confiscations inflicted on heretics; they were exempt from all public duties and services incompatible with their functions, and no statutes were to be passed interfering with their actions. The ruler was bound when required to send his assessor or a knight to aid them, and every inhabitant when called upon was obliged to assist them, under a heavy penalty. When the inquisitors visited any portion of the jurisdiction they were accompanied by a deputy of the ruler elected by themselves or by the bishop. In each place visited, this official was to summon under oath three men of good repute, or even the whole vicinage, to reveal any heretics within their knowledge, or the property of such, or of any persons holding secret conventicles or differing in life or
