Correspondence, diaries, memoranda, speeches, and statesments documenting Bonsal's foreign service career, especially as U.S. ambassador to Cuba during and after the 1959 revolution there. Includes material on the differences between Cordell Hull and Sumner Welles regarding Argentina and ideological battles at international meetings over the independence of colonial Africa. Also includes Bonsal's English translation from the French of Emile Ollivier's book L'Expedition du Mexique (1914) concerning Maximilian, Emperor of Mexico.