Subseries contains Ronald St. John Macdonald's correspondence with different individuals and organizations, including A. Donat Pharand, J. Alan Beesley, Bozidar Bokatic, Charles B. Bourne, Donald A. Kerr, Donald McInnes, Douglas M. Johnston, Edgar Gold, Elisabeth Mann Borgese, Gerald L. Morris, Ivan Leigh Head, John P. Humphrey, John King Gamble Jr., Leslie C. Green, Maxwell Cohen, Wang Tieya, the Canadian Department of External Affairs, the Council of Europe, and others, regarding a wide range of subjects.