Columbia subject headings:
Harvard subject headings:
Slavery--United States--Controversial literature--1863.
Slavery--United States--Controversial literature.
United States--History--Civil War, 1861-1865
United States--History--Civil War, 1861-1865--Sermons.
Princeton subject headings:
Slavery--United States--Controversial literature.
United States--History--Civil War, 1861-1865.