- 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.
- Two letters from Lysander Spooner to George Bradburn. A two-page note dated June 21, 1845, notifying that Amasa Walker will be visiting the store of Emerson, Harris & Potter if Bradburn would like to see him. Followed by a one-page letter dated October 17, 1845, notifying that he must leave Boston to attend to his mother in Athol [Massachusetts].
- Four-page letter dated February 23, 1846, from George Bradburn in Lowell [Massachusetts] to Lysander Spooner in Athol [Massachusetts], in which he copies a letter received by James Haughton [?] of Dublin, who discusses Spooner's work, and metions the affections of Elizabeth Sargeant. Followed by an additional note dated February 24, in which he mentions [Samuel E.] Sewall's criticisms of Spooner's work.