6. "became postmaster general, and Edwin M. Stanton, Lincoln’s Mars, eventually became secretary"
- Doris Kearns Goodwin, Team of Rivals: The Political Genius of Abraham Lincoln
9. "He seemed less in need of a secretary than of someone to listen to him."
- Barbara W. Tuchman, The Proud Tower: A Portrait of the World Before the War
10. "on-air appearance you could see that the secretary of state"
- Chris Matthews, Chris Matthews Complete Library E-book Box Set: Tip and the Gipper