Complex sentence: Tunstall soon won the friendship of William Warham, Archbishop of Canterbury, who on August 25,1511 made him his chancellor, and shortly after rector of Harrow on the Hill.
Split into simpler sentences: Tunstall soon won the friendship of William Warham, Archbishop of Canterbury. Warham made Tunstall his chancellor on August 25,1511, and shortly after appointed him rector of Harrow on the Hill.