Other questions about practices enjoined in the Articles arose. A "Confession," in which Knox's style may be traced, was drawn up, and consequently that "Declaration on Kneeling" was intercalated into the Prayer Book, wherein it is asserted that the attitude does not imply adoration of the elements, or belief in the Real Presence, "for that were idolatry." Elizabeth dropped, and Charles II. restored, this "Black Rubric" which Anglicanism owes to the Scottish Reformer. {36a} He "once had a good opinion," he says, of the Liturgy as it now stood, but he soon found that it was full of idolatries. The most important event in the private life of Knox, during his stay at Berwick, was his acquaintance with a devout lady of tormented conscience, Mrs. Bowes, wife of the Governor of Norham Castle on Tweed. Mrs. Bowes's tendency to the new ideas in religion was not shared by her husband and his family; the results will presently be conspicuous. In April 1550, Knox preached at Newcastle a sermon on his favourite doctrine that the Mass is "Idolatry," because it is "of man's invention," an opinion not shared by Tunstall, then Bishop of Durham. Knox used "idolatry" in a constructive sense, as when we talk of "constructive treason." But, in practice, he regarded Catholics as "idolaters," in the same sense as Elijah regarded Hebrew worshippers of alien deities, Chemosh or Moloch, and he later drew the inference that idolaters, as in the Old Testament, must be put to death. Thus his was logically a persecuting religion. Knox was made a King's chaplain and transferred to Newcastle. He saw that the country was, by preference, Catholic; that the life of Edward VI. hung on a thread; and that with the accession of his sister, Mary Tudor, Protestant principles would be as unsafe as under "umquhile the Cardinal." Knox therefore, "from the foresight of troubles to come" (so he writes to Mrs. Bowes, February 28, 1554), {36b} declined any post, a bishopric, or a living, which would in honour oblige him to face the fire of persecution. At the same time he was even then far at odds with the Church of England that he had sound reasons for refusing benefices. On Christmas day, 1552, {37a} he preached at Newcastle against Papists, as "thirsting nothing more than the King's death, which their iniquity would procure." In two brief years Knox was himself publicly expressing his own thirst for the Queen's death, and praying for a Jehu or a Phinehas, slayers of idolaters, such as Mary Tudor. If any fanatic had taken this hint, and the life of Mary Tudor, Catholics would have said that Knox's "iniquity procured" the murder, and they would have had fair excuse for the assertion.