1. See Table 3 for a summary of the background of the Ambassadors at Large.
2. Warren Ilchman, Professional Diplomacy in the United States, 1779–1939: A Study in Administrative History (Chicago: University of Chicago Press, 1961), p. 167.
3. Ibid.., pp. 164, 170–171.
4. Henry S. Villard, Affairs at State (New York: Thomas Y. Crowell, 1965), p. 152.
5. See John E. Harr, The Professional Diplomat (Princeton, New Jersey: Princeton University Press, 1969).