In the grounds of Clarence House, London , members of Princess Elizabeth's Household have an open-air talk on details for the Princess' approaching tour of Canada . Left to right Lieutenant Michael Parker , RB ( Equerry-in-waiting to the Duke of Edinburgh) , Lieutenant-General Sir Frederick (Boy) Browning (Comptroller and Treasurer of Princess Elizabeth's Household ) and Major the Hon Martin Charteris ( Princess Elizabeth's Private Secretary ) . They will accompany Princess Elizabeth and the Duke of Edinburgh on the tour . 3 August 1951