Alexander Pope (1819). “The Poetical Works of Alexander Pope: In Three Volumes Complete : with His Last Corrections, Additions, and Improvements, Together with All His Notes, as They Were Delivered to the Editor a Little Before His Death : Together with the Commentary and Notes of Mr. Warburton”, p.62
Henry David Thoreau (2017). “HENRY DAVID THOREAU – The Man, The Philosopher & The Trailblazer (Illustrated): Biographies, Memoirs, Autobiographical Books & Personal Letters (Including Walden, A Week on the Concord and Merrimack Rivers, The Maine Woods, Cape Cod, A Yankee in Canada…)”, p.133, e-artnow