In 1961, after the successful conclusion of the International Geophysical Year, Sydney Chapman wrote his close colleague, Marcel Nicolet. As President of the Comité Spécial de l'Anneé Géophysique Internationale (CSAGI), which oversaw the operation of the IGY, Chapman had accumulated many cartons of private letters, telegrams, and documents on sensitive international negotiations and governmental instructions. Should we save these? Chapman asked Nicolet, a senior member of the Royal Meteorological Institute of Belgium and fellow CSAGI member. What about the confidential papers dealing with Communist Chinese participation in the IGY and the publications controversy?