Telegram from [John] Martin [Prime Minister's Principal Private Secretary, Cairo, Egypt] to Private Office marked "Advance Copy", "From: Argonaut", and "Jason 560" passing on a message from WSC to Sir Walter Citrine [General Secretary of the Trades Union Congress and President of the International Federation of Trade Unions] thanking him and the delegates of the World Trade Union Conference for their encouragement [in the Yalta Conference negotiations].