Edward Gibbon (2016). “THE HISTORY OF THE DECLINE AND FALL OF THE ROMAN EMPIRE (All 6 Volumes): From the Height of the Roman Empire, the Age of Trajan and the Antonines - to the Fall of Byzantium; Including a Review of the Crusades, and the State of Rome during the Middle Ages”, p.1005, e-artnow
George Berkeley (1732). “Alciphron: Or, The Minute Philosopher. In Seven Dialogues. Containing an Apology for the Christian Religion Against Those who are Called Free-thinkers ...”, p.216