Conversation with George Sewall Boutwell concerning the nomination of Salmon P. Chase to the U.S. Supreme Court, reported by Boutwell in his "Reminiscences of Sixty Years in Public Affairs", vol. 2, (p. 29), 1902.
Reply to an Emancipation Memorial (1862), published in "The Life and Public Services of Abraham Lincoln" edited by Henry Jarvis Raymond and Francis Bicknell Carpenter, (p. 255), 1865.