Joseph Lewis, Robert Green Ingersoll (1957). “Ingersoll the Magnificent: To which Has Been Added a Special Arrangement of Some Gems from Ingersoll for Inspiration, Wisdom, and Courage”
Robert Green Ingersoll (1898). “Lectures of Col. R.G. Ingersoll: Including His Answers to the Clergy, His Oration at His Brother's Grave, Etc., Etc. : Complete”