General Alfred Gruenther was Eisenhower's successor as Supreme Commander of the NATO forces in Europe and his former chief of staff at SHAPE and was a close friend of Monnet. He suggested David Bruce as roving Ambassador to High Authority, helped expedite matter for Monnet by putting pressure on Eisenhower and John Foster Dulles. Gruenther was one of many of Eisenhower's chief aides whom Monnet was able to use as a contact to influence the administration's policies on Europe. He was also involved in the discussions between Eisenhower and Monnet on the European Defence Community (EDC).

The originals are held in various Archives and Presidential Libraries in the USA