Speech at Columbia University's bicentennial on May 31, 1954. "Public Papers of the Presidents of the United States: Dwight D. Eisenhower". Book by Dwight D. Eisenhower, p. 524, 1961.
Robert Green Ingersoll (1898). “Lectures of Col. R.G. Ingersoll: Including His Letters on the Chinese God--Is Suicide a Sin?--The Right to One's Life--etc. Etc. Etc”
"Ecclesiastical Sonnets (1821)". Part II, No. 17. "The Ecclesiastical sonnets of William Wordsworth", edited by Abbie Findlay Potts, archive.org. 1922.