SUMNER, Charles. The Barbarism of Slavery. Speech of Hon. Charles Sumner, on the Bill for the Admission of Kansas as a Free State. In the United states Senate, June 4, 1860. Washington, DC: Thaddeus Hyatt, 1860. 1st ed. thus. 32pp. double-columned. Orig. printed wrappers. Disbound. Wrappers separated but present, some light foxing, chipping to exterior leaves. Sumner delivered this strong attack on slavery, especially its extension in Kansas. This was his first speech after returning to the Senate upon his recovery from his caning by Preston Brooks in 1856.