Columbia subject headings:
Mobs--Washington (D.C.)
Palfrey, John Gorham, 1796-1881.
Slavery--United States--Speeches in Congress.
United States. Congress. House--Freedom of debate.
Harvard subject headings:
Slavery--United States--Speeches in Congress
Washington (D.C.)--Riot, 1848--Speeches in Congress.
Princeton subject headings: