[Sidenote: They are denounced.] In the eye of Rome all this was an abomination. Were human laws to take the precedence of the law of God? Were the clergy to be degraded to a level with the laity? Were the Jew and the Mohammedan to be permitted their infamous rites? Was this new-born product of the insolence of human intellect--this so-called science--to be brought into competition with theology, the heaven-descended? Frederick and his parliaments, his laws and universities, his libraries, his statues, his pictures and sonnets, were denounced. Through all, the ever-watchful eye of the Church discerned the Jew and the Saracen, and held them up to the abhorrence of Europe. But Gregory was not unwilling to show what could be done by himself in the same direction. He caused a compilation of the Decretals to be issued, intrusting the work to one Raymond de Pennaforte, who had attained celebrity as a literary opponent of the Saracens. It is amusing to remark that even this simple work of labour could not be promulgated without the customary embellishments. It was given out that an angel watched over Pennaforte's shoulder all the time he was writing. [Sidenote: Outbreak of his quarrel with the pope,] Meantime an unceasing vigilance was maintained against the dangerous results that would necessarily ensue from Frederick's movements. In Rome, many heretics were burned; many condemned to imprisonment for life. The quarrel between the pope and the emperor was resumed; the latter being once more excommunicated, and his body delivered over to Satan for the good of his soul. Again Frederick appealed to all the sovereigns of Christendom. He denounced the pontiff as an unworthy vicar of Christ, "who sits in his court like a merchant, weighing out dispensations for gold--himself writing and signing the bulls, perhaps counting the money. He has but one cause of enmity against me, that I refused to marry to his niece my natural son Enzio, now King of Sardinia." "In the midst of the Church sits a frantic prophet, a man of falsehood, a polluted priest." To this Gregory replied. [Sidenote: who rouses Christendom against him.] The tenor of his answer may be gathered from its commencement: "Out of the sea a beast is arisen, whose name is written all over 'Blasphemy.'" "He falsely asserts that I am enraged at his refusing his consent to the marriage of my niece with his natural son. He lies more impudently when he says that I have pledged my faith to the Lombards." "In truth, this pestilent king maintains, to use his own words, that the world has been deceived by three impostors--Jesus Christ, Moses, and Mohammed; that of these two died in honour, and the third was hanged on a tree. Even now, he has asserted, distinctly and loudly, that those are fools who aver that God, the Omnipotent Creator of the world, was born of a woman." This was in allusion to the celebrated and mysterious book, "De Tribus Impostoribus," in the authorship of which Frederick was accused of