Complex sentence: Their son, William, later Sir William, was born 11 October 1748, their daughter, Anne married John Buller MP for West Looe and then Truro, of Morval.
Split into simpler sentences: Their son, William, later Sir William, was born 11 October 1748. Their daughter, Anne married John Buller MP for West Looe and then Truro, of Morval.