Robert Green Ingersoll 
Hell / Warm Words on the Cheerful and Comforting Doctrine of Eternal Damnation [EPUB ebook] 

Robert Green "Bob" Ingersoll (August 11, 1833 – July 21, 1899) was an American lawyer, a Civil War veteran, political leader, and orator of United States during the Golden Age of Free Thought, noted for his broad range of culture and his defence of agnosticism. He was nicknamed "The Great Agnostic". His radical views on religion, slavery, woman’s suffrage, and other issues of the day effectively prevented him from ever pursuing or holding political offices higher than that of state attorney general. Illinois Republicans tried to pressure him into running for governor on the condition that Ingersoll conceal his agnosticism during the campaign, which he refused to do on the basis that concealing information from the public was immoral. (Excerpt from Wikipedia)