12. Horace Mann, Speech of Horace Mann, of Massachusetts, on the Subject of Slavery in the Territories, and the Consequences of the Threatened Dissolution of the Union. Delivered in the United States House of Representatives, February 15, 1850 (Washington, DC: Gideon & Co., 1850). (15 p.)


Speech objecting to the extension of slavery into the territories during the debate leading up to the Compromise of 1850. (The collection has another copy of this speech issued by a different publisher in volume 100 [no. 30].)