Papers relating to the abolition of the slave trade and slavery; papers relating to the Republic of Haiti and the Kingdom of Haiti; papers relating to the Clarkson Family, including Catherine Clarkson, and friends; and miscellaneous papers including those relating to recent research into Clarkson's work. The majority of the papers date from Clarkson's lifetime.

Correspondence of William Wilberforce, mainly written by him, on a range of subjects including political and family matters; a notarial document relating to some of Wilberforce's ancestors.

Material relating to the slavery abolition movement. Includes newspaper cuttings from the nineteenth century; letters and papers used in Parliamentary reports on the slave trade from 1814; accounts of Parliamentary debates and investigations; pamphlets written by Thomas Clarkson, William Wilberforce and other campaigners; pamphlets printed by the Anti Slavery Society in the 1970s; contemporary pamphlets and articles on abolition; material on events commemorating the 150th anniversary of Clarkson's death; contemporary records relating to slave ownership.