- A Lecture: On the Topography and History of New-York (Classic Reprint)
- Public Record: Including Speeches, Messages, Proclamations, Official Correspondence, and Other Public Utterances of Horatio Seymour; From the Campaign of 1856 to the Present Time. With an Appendix
- Speech of Hon. Horatio Seymour, Before the Democratic Union State Convention, at Albany, September 10th, 1862, on Receiving the Nomination for Governor
- A Lecture on the Topography and History of New York Volume 1
- Speeches of Hon. Horatio Seymour, at the Conventions Held at Albany, January 31, 1861 and September 10, 1862