Dulles was secretary of state under Eisenhower, Jan. 1953-Apr. 1959. Herter was Dulles' undersecretary of state, Feb. 1957-Apr. 1959, and succeeded him as secretary of state, Apr. 1959-Jan. 1961. The microfilm set includes White House correspondence and memos between Dulles, Eisenhower and his advisors, memos of conversations with the president, statements and speeches, Cabinet briefing materials, classified letters, and diplomatic notes.