Papers of the New York State lawyer, U.S. Congressman (1859-1863), abolitionist, born near Pompey, N.Y. Correspondence (1847-1891); genealogical material; legal and financial records (1814-1879); writings (1837-1884), including essays, speeches, and published letters; and memorabilia. Largely family correspondence with additional letters of Louis Agassiz, Samuel Bowles, Salmon P. Chase, F.J. Child, James Freeman Clarke, Roscoe Conkling, George W. Curtis, John A. Dahlgren, Richard H. Dana, H.L. Dawes, Daniel S. Dickinson, J.T. Fields, John M. Forbes, John C. Frémont, William Lloyd Garrison, George W. Geddes, George F. Hoar, John Jay, Thomas Starr King, Samuel J. May, Robert B. Minturn, Levi P. Morton, Charles Eliot Norton, Elizabeth P. Peabody, Wendell Phillips, William H. Seward, Gerrit Smith, Israel Washburn, R.S. Watson, Andrew D. White, and others.

Papers of the British scholar, man of letters. Seventy-six letters written between 1864 and 1897 to Moncure Daniel Conway on a variety of topics including politics, religion, and social reform.