Columbia subject headings:
Douglas, Stephen A. (Stephen Arnold), 1813-1861.
Harvard subject headings:
Douglas, Stephen A. (Stephen Arnold), 1813-1861.
Lincoln, Abraham, 1809-1865
Lincoln-Douglas Debates, Ill., 1858.
United States--Politics and government--1857-1861.
Princeton subject headings:
Douglas, Stephen A. (Stephen Arnold), 1813-1861.