U. S.
U. S. Constitution
U. S. Marshal
U. S. Senate
U.S. brig Porpoise
U.S. Constitution
Ulysses S. Grant
Uncle Tom
Uncle Tom Fund
Uncle Tom's Cabin
unconditional emancipation
Underground Railroad
Underground Railway
unemployment
union
Union Butchers
Union County jail
Union Party
Union Progressive Association
Unionism
Unionists
Unitarian
Unitarians
United Anti-Slavery Society
United Kingdom
United Presbyterian
United States
unity
universal emancipation
Universal Liberty
universal peace
Universal Suffrage
Universalism
Universe
universities
university
University of Glasgow
UNSPECIFIED
Unviersal Freedom
Upper Canada
USS Ethan Allen
Utah
Utica
Utica Convention
Utica Gazette