Kennedy, Robert F. Washington, D.C., September 2, 1964. 8vo. One sheet folded in half creating 4 pp. typed letter, signed by Robert F. Kennedy, to Edward L. Katzenbach, Jr., Deputy Assistant Secretary of Defense for Education and Manpower Resources, offering his gratitude for Katzenbach's work on an education committee. On Attorney General stationery, with Department of Justice blind stamp at top corner. Creasing from original folds, signature strong and clear. Together with: McNamara, Robert S. Washington, D.C., July 7, 1964. 8vo. 1 p. typed letter, signed by Robert McNamara, to Edward L. Katzenbach, Jr., Deputy Assistant Secretary of Defense for Education and Manpower Resources, accepting, with regret, Katzenbach's resignation from the Department of Defense. On Secretary of Defense stationery, with an additional, unsigned, onionskin copy. Creasing from original folding, signature strong and clear.