Columbia subject headings:
Authors, American--19th century--Biography.
Thoreau, Henry David, 1817-1862--Ethics.
Harvard subject headings:
Authors, American--19th century--Biography
Biographies.
Thoreau, Henry David, 1817-1862--Biography--Character.
Princeton subject headings:
Authors, American--19th century--Psychology.
Authorship--Psychological aspects.
Thoreau, Henry David, 1817-1862--Psychology.