V 1877 mu byl udělen čestný MA z Yale, pak čestným Ph.D. z Rutgers 1882, a konečně o LL.D. od Hillsdale College v roce 1885.
In 1877 he was awarded an honorary M.A. from Yale, then an honorary Ph.D. from Rutgers in 1882, and finally an LL.D. from Hillsdale College in 1885.