Columbia subject headings:
American literature--19th century--History and criticism.
United States--Civilization--19th century.
United States--Civilization.
Harvard subject headings:
American literature--19th century--History and criticism
Melville, Herman, 1819-1891
United States--Civilization.
Whitman, Walt, 1819-1892
Princeton subject headings:
American literature--19th century--History and criticism.
United States--Civilization--19th century.