About the doctrine of the Immaculate Conception, a purely dogmatic development, a further mass of superstition spread, and gave rise to bitter controversies, the Franciscans and Dominicans quarrelling so fiercely that in 1482 popular tumults broke out in Italy on this mysterious topic, of which everybody was supposed to know something. The theory that the Virgin Mary never from the moment of her conception shared the sinful tendencies of ordinary mortals was something of a novelty, and the Dominicans who rejected it had tradition in their favour, but they were overborne by the increasing power of the new superstition. An Italian priest who in 1504 maintained that Christ was conceived in the Virgin’s heart was seized by the Inquisition, and had a narrow escape from death by fire. A special appearance of the Virgin herself, who expressed her annoyance at the doctrine, caused an immense sensation until it was discovered that the manifestation was a trick got up by the Dominicans, and four of the culprits were burnt. Not until 1854, after five centuries of struggle, was the doctrine officially proclaimed as a formal act of faith, when the Dominicans obediently began to find reasons in its favour. It would seem to be a logical sequence that the reputed father of the Virgin was no more concerned in her birth than Joseph was supposed to be in that of Jesus, but for maintaining this thesis a man was condemned so recently as 1876. _Censorship of Books._ Notwithstanding the extent to which heresy was propagated by printed books, it was a long time before the Inquisition was recognized as the most convenient instrument for their supervision and suppression. The first Papal deliverance on the subject was a Bull by Gregory XI in 1376, instructing the Inquisition to examine and condemn suspected writings, but what were the results is not known. An Archbishop who burnt some writings of John Wycliffe at Prague was found to have exceeded his powers, and it was not till the beginning of the sixteenth century that a regular censorship was organized, and then in Germany only. However, the Inquisition was willing to undertake additional responsibilities, and at length made a rule that any one possessing books of doubtful orthodoxy must within eight days deliver them to the Bishop or Inquisitor of his district, on pain of being under vehement suspicion of heresy. That the Church was more anxious to preserve its privileges than to promote religion may be inferred from the fact that translations into the vernacular of any parts of the Bible were prohibited. As it was found before long that books containing heretical doctrines were being circulated, it was deemed expedient to forbid anything being printed without previous examination by the Holy Office and the Papal and episcopal authorities. The religious world, however, became so disorganized by the Reformation that these precautions were of little