Columbia subject headings:
Fugitive slaves--Legal status, laws, etc.--United States--History--19th century.
Fugitive slaves--United States--History--18th century.
Fugitive slaves--United States--History--19th century.
Slavery--United States--History--18th century.
Slavery--United States--History--19th century.
United States--History--Civil War, 1861-1865--Causes.
Harvard subject headings:
Fugitive slaves--Legal status, laws, etc.--United States--History--19th century.
Fugitive slaves--United States--History--18th century.
Fugitive slaves--United States--History--19th century.
Slavery--United States--History--18th century
Slavery--United States--History--19th century
United States--History--Civil War, 1861-1865--Causes.
Princeton subject headings:
Fugitive slaves--Legal status, laws, etc.--United States--History--19th century.
Fugitive slaves--United States--History--18th century.
Fugitive slaves--United States--History--19th century.
Slavery--United States--History--18th century.
Slavery--United States--History--19th century.
United States--History--Civil War, 1861-1865--Causes.