Complex sentence: Edward was the son and heir of Sir Edward Fitton (the elder) of Gawsworth, Cheshire, being disappointed in his expectation of succeeding his father as vice-treasurer of Ireland, he retired to England shortly after having been knighted by Sir William Pelham.
Split into simpler sentences: Edward was the son and heir of Sir Edward Fitton (the elder) of Gawsworth, Cheshire. Being disappointed in his expectation of succeeding his father as vice-treasurer of Ireland, he retired to England shortly after having been knighted by Sir William Pelham.