 In 1555, on the return of John Knox to Scotland, he resorted openly to hear him preach.When the Reformer, at the request of the Earl Marischal, addressed to the Queen Regent, Mary of Guise a letter in which he earnestly exhorted her to protect the reformed preachers, and to consent to a Reformation in the church, Glencairn had the boldness to deliver it to Her Majesty, who, after glancing carelessly over it, handed to James Beaton, Archbishop of Glasgow, and contemptuously said