_Gregory answers._—A certain secular law in the Roman commonwealth allows, that the son and daughter of a brother and sister,(125) or of two full brothers, or two sisters, may be joined in matrimony; but we have found, by experience, that the offspring of such wedlock cannot grow up; and the Divine law forbids a man to “uncover the nakedness of his kindred.” Hence of necessity it must be the third or fourth generation of the faithful, that can be lawfully joined in matrimony; for the second, which we have mentioned, must altogether abstain from one another. To marry with one’s stepmother is a heinous crime, because it is written in the Law, “Thou shalt not uncover the nakedness of thy father:” now the son, indeed, cannot uncover his father’s nakedness; but in regard that it is written, “They twain shall be one flesh,” he that presumes to uncover the nakedness of his stepmother, who was one flesh with his father, certainly uncovers the nakedness of his father. It is also prohibited to marry with a sister-in-law, because by the former union she is become the brother’s flesh. For which thing also John the Baptist was beheaded, and obtained the crown of holy martyrdom. For, though he was not ordered to deny Christ, and it was not for confessing Christ that he was killed, yet inasmuch as the same Jesus Christ, our Lord, said, “I am the Truth,” because John was killed for the truth, he also shed his blood for Christ. But forasmuch as there are many of the English, who, whilst they were still heathens, are said to have been joined in this unholy union, when they attain to the faith they are to be admonished to abstain, and be made to know that this is a grievous sin. Let them fear the dread judgement of God, lest, for the gratification of their carnal desires, they incur the torments of eternal punishment. Yet they are not on this account to be deprived of the Communion of the Body and Blood of Christ, lest they should seem to be punished for those things which they did through ignorance before they had received Baptism. For in these times the Holy Church chastises some things with zeal, and tolerates some in mercy, and is blind to some in her wisdom, and so, by forbearance and blindness often suppresses the evil that stands in her way. But all that come to the faith are to be admonished not to presume to do such things. And if any shall be guilty of them, they are to be excluded from the Communion of the Body and Blood of Christ. For as the offence is, in some measure, to be tolerated in those who did it through ignorance, so it is to be rigorously punished in those who do not fear to sin knowingly. _Augustine’s Sixth Question._—Whether a bishop may be consecrated without other bishops being present, if there be so great a distance between them, that they cannot easily come together?