In the meantime, Samuel Rutherford published his 1644 "Lex, Rex", which argued against the bishop's conception of royal authority. When the news reached him at Dublin of the surrender of Charles by the Scottish army (30 January 1647), he retired to his closet and was found dead on his knees on 14 February 1647. His age was about 55. He was buried in Christ Church Cathedral. He married Elizabeth Innes, by whom he had four sons, John, David, James, and Robert, and five daughters, Anne, Janet, Elizabeth, Rachel, and Bethia. Archbishop Maxwell left a great many writings of religious and political nature.