The Slave Trade, Domestic and Foreign Why It Exists, and How It May Be Extinguished

The Great Conspiracy, Volume 3

Slavery as an industrial system

Slavery: letters and speeches

The Slavery Question

Charles Sumner: his complete works, volume 10 (of 20)

Thoughts on Slavery and Cheap Sugar A Letter to the Members and Friends of the British and Foreign Anti-Slavery Society

American slavery, and the means of its abolition

Walker's Appeal, with a Brief Sketch of His Life And Also Garnet's Address to the Slaves of the United States of America

Het Anarchisme in de Arbeidersbeweging

Charles Sumner: his complete works, volume 05 (of 20)

Slavery and four years of war