Thomas Paine (2015). “Common Sense, The Crisis, & Other Writings from the American Revolution: (Library of America Paperback Classic)”, p.333, Library of America
John Ruskin, Louisa Caroline Tuthill (1860). “The True and the Beautiful in Nature, Art, Morals and Religion: Selected from the Works of John Ruskin...”, p.254
John Brown (1797). “The posthumous works of the late Rev. Mr. John Brown, minister of the Gospel at Haddington: with short memoirs, and a summary of what he uttered in his last illness”, p.20