- The Works of Robert G. Ingersoll, Vol. 07 (of 12) : Dresden Edition—Discussions
- The Works of Robert G. Ingersoll, Vol. 3 of 12: Lectures
- Proceedings of the Senate and Assembly of the State of New York, in Relation to the Death of Ex-Senator Roscoe Conkling, Held at the Capitol, May 9, 1888
- Agnosticism, and Other Essays
- An Oration on the Gods