Here he continued till the end of August 1572, when the civil broils were a little abated, upon which receiving a letter from Edinburgh, he returned to his flock. He was now much oppressed with the infirmities of old age, and the extraordinary fatigues he had undergone; the death of the good regent, the earl of Moray, had made deep impressions on him, but when he heard of the massacre of Paris[34], and the murder of the good admiral Coligni, these melancholy news almost deprived him of his life. Upon finding his dissolution approaching, he prevailed with the council and kirk-session of Edinburgh, to concur with him in admitting one Mr. James Lawson as his successor, who was at that time professor of philosophy in the college of Aberdeen; he wrote a letter to Mr. Lawson, intreating him to accept of this charge, adding this postscript, _Accelera, mi frater, alioqui sero venies_, i. e. Make haste, my brother, otherwise you will come too late, meaning, that if he came not speedily, he would find him dead: which words had this effect on Mr. Lawson, that he set out immediately, making all possible haste to Edinburgh, where, after he had preached twice to the full satisfaction of the people, the ninth of November was appointed for his admission unto that congregation. Mr. Knox (though then still weaker) preached upon that occasion with much power, and with the greatest comfort to the hearers. In the close of his sermon, he called God to witness, that he had walked in a good conscience among them, not seeking to please men, nor serving his own nor other men's inclinations, but in all sincerity and truth preaching the gospel of Christ. Then praising God, who had given them one in his room, he exhorted them to stand fast in the faith they had received, and having prayed fervently for the divine blessing upon them, and the increase of the Spirit upon their new pastor, he gave them his last farewel, with which the congregation were much affected.