 The years of her second marriage appear to have been happy and fruitful; during this period she completed her History of England and wrote the Treatise on the Immutability of Truth, which was published in 1783. With her husband she toured the United States, made a particular friend of Mercy Otis Warren, and visited George Washington at Mount Vernon. Her last works were The Letters on Education and her response to Burke’s Reflections on the Revolution in France both of which appeared in 1790. She died on 22 June 1791.