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 Letters on the Chinese God--Is Suicide a Sin?--The Right to One's Life--etc. Etc. Etc”