- Correspondence and papers of the Massachusetts Anti-Slavery Society, originally known as the New-England Anti-Slavery Society. Included are petitions to the legislature, resolutions, donations to the Liberator, lists of members and supporters, letters about slavery, editorials, meetings, a list of individuals who had escaped slavery and were aided by the Vigilance Committee, accounts of others who had fled from slavery, including the narrative of Jonathan Thomas, a man who had escaped slavery in Kentucky; and lists, letters, editorials, and other papers pertaining to the notorious case of Anthony Burns. Persons whose names appear frequently include: Francis Jackson, Wendell Phillips, Ellis Gray Loring, Edmund Quincy, William Lloyd Garrison, and Samuel E. Sewall.
- Correspondence, including letters received and copies of letters sent by Boston lawyer and abolitionist Lysander Spooner (1808-1887). Many of the letters pertain to Spooner’s activities as an abolitionist and author of works opposing slavery. Included are 100 letters to or from George Bradburn, 106 letters to or from Gerrit Smith, 7 pieces of correspondence with Charles D. Cleveland, 7 with Daniel Drayton, 19 with Richard Goodell, 10 with Charles D. Miller, 9 with John A. Thomson, 11 letters from Daniel McFarland, and 4 letters from Lewis Tappan.