Title: Rex Theologvs. The Preachers Guard and Guide In the Didactical Part of his Duty. Or, A Vindication, shewing that the King's Majesty's Letter to the late L. Archbishop of Canterbury is most conformable to the Judgment and Practice of Antiquity. Wherein is discuss'd, {1. The Duty of Preaching in general. 2. To Whom it primarily belongs. 3. How managed in the Ancient Church. 4. What Innovations these later times have made