Carl Schurz's Life of Henry Clay is far the ablest and most interesting
that I have read. The Life of Clay by Colton is fuller and more
pretentious, but is diffuse. Benton's Thirty Years in Congress should be
consulted; also the various Lives of Webster and Calhoun. See also
Wilson's Rise and Fall of the Slave Power in America. The writings of
the political economists, like Sumner, Walker, Carey, and others, should
be consulted in reference to tariffs. The Life of Andrew Jackson sheds
light on Clay's hostility to the hero of New Orleans.