Alexander Pope (1806). “The works of Alexander Pope. Containing the principal notes of drs. Warburton and Warton [&c.]. To which are added, some original letters, with additional observations, and memoirs, by W.L. Bowles”, p.64
"Poland: The Knight Among Nations". Book by Louis E. Van Norman (p. 290), 1907; later quoted in "The Language of God: A Scientist Presents Evidence for Belief", book by Francis Collins (pp. 230-231), 2006.