Columbia subject headings:
Barnum, P. T. (Phineas Taylor), 1810-1891.
Circus owners--United States--Biography.
Circus owners--United States--Correspondence.
Harvard subject headings:
Barnum, P. T. (Phineas Taylor), 1810-1891
Circus owners--United States--Biography
Circus owners--United States--Correspondence.
Princeton subject headings:
Barnum, P. T. (Phineas Taylor), 1810-1891.
Circus owners--United States--Biography.
Circus owners--United States--Correspondence.