Speech of Hon. Horace Mann, on the Right of Congress to Legislate for the Territories of the United States, and Its Duty to Exclude Slavery Therefrom

Speech of Horace Mann, of Massachusetts, in the House of Representatives, Feb. 23, 1849; on Slavery in the United States, and the Slave Trade in the District of Columbia . .

Horace Mann's Letters on the Extension of Slavery into California and New Mexico

Twelve Sermons