Complex sentence: He was a zealous Whig, the friend of Addison and, though of different political views, of Pope, and he ended his career as physician to George I, by whom he was knighted in 1714.
Split into simpler sentences: He was a zealous Whig, the friend of Addison and, though of different political views, of Pope. He ended his career as physician to George I, who knighted home in 1714.