The Age of Adam (1947) The Tudor Renaissance (1951) The Age of Inigo Jones (1953) Roman Mornings (1956) Earls of Creation: Five Great Patrons of Eighteenth-Century Art (1962) St Peter's: The Story of Saint Peter's Basilica in Rome (1967) English Country Houses: Baroque, 1685–1715 (1970) Another Self (1970), an autobiographical novel William Beckford (1976) Round the Clock (1978) Harold Nicolson: A Biography, 2 vols.