The Works of Robert G. Ingersoll, Volume 5 (Barnes & Noble Digital Library)

In the1880s, Ingersoll, the arch-agnostic and skeptic, carried on a theological feud—fought from the pulpit and lectern—with Presbyterian reformer Thomas De Witt Talmage. Volume five of Ingersoll’s collected works includes “Six Interviews on Talmage,” “The Talmagian Catechism,” and “A Vindication of Thomas Paine.”