- Manuscript draft of a four-page letter from Lysander Spooner in Boston [Massachusetts], dated March 12, 1856, to "Gerrit Smith, Lewis Tappan, William Goodell and others" dated March 12, 1856, explaining the reasons that Spooner has not joined the Liberty Party. At end, an additional note addressed to Gerrit Smith, requesting that he read the letter and then foward on to Goodell if he thinks it proper.
- Manuscript copy of a correspondence between Edmund Jackson and Hon. Robert C. Winthorp, in which Jackson asks for Winthorp's position on slavery before his election to United States Congress. Includes Winthorp's response dated November 2, 1840, in which he replies that he "cannot regard it as desirable or expedient to attempt any alteration of the Constitution in relation to slavery."
- Three-page letter marked 'Confidential' to Lysander Spooner of Boston [Massachusetts] requesting his participation in an Executive Committee formed to advocate for the enlistment of blacks to fight in the Civil War. Signed by George L. Stearns on behalf of the Committee. This letter is part of the Slavery collection in New-York Historical Society.