A file of correspondence and memoranda concerning Australian security and Balkan politics. Subjects discussed in this file include Secret Intelligence Service (MI6) investigations after the leakage of information about missiles in Australia; the conclusion that there was a network of Soviet agents operating in Australia; recommendations to prevent similar incidents in future; American objections to the arrival of a group of Australian scientists in Britain on an exchange programme due to fear that they might gain access to military secrets; Soviet involvements in the Balkans; international supervision of Greek elections; a proposal that Hungary, Romania, and Bulgaria be run by Allied tripartite commissions (refused by the Soviets); and a report of an imminent communist coup in Romania.