Sir Winston Churchill, Earl Alexander of Tunis and John Diefenbaker standing, in entranceway of the Churchills' Hyde Park Gate house, London, England, 12 May 1960.

Sir Winston Churchill (with cigar in mouth) and John Diefenbaker, standing in conversation on sidewalk outside entranceway of Churchills' Hyde Park Gate house, London, England, 12 May, 1960.

Sir Winston Churchill (with cigar in mouth) holding car door for John Diefenbaker outside entranceway of Churchills' Hyde Park Gate house, London, England, 12 May, 1960.

Sir Winston Churchill (with cigar in mouth) holding car door for John Diefenbaker outside entranceway of Churchills' Hyde Park Gate house, 3/4 view of both men, London, England, 12 May, 1960.

Sir Winston Churchill (with cigar in left hand) raising right hand in farewell to John and Olive Diefenbaker from the entranceway of the Churchills' Hyde Park Gate house, London, England, 12 May, 1960.

Olive Diefenbaker, Mrs. Ted Leather (wife of British Member of Parliament), Lady Dorothy Macmillan (wife of British Prime Minister Macmillan), and Lady Alexander of Tunis posing in formal dress in London, May 1960.

John and Olive Diefenbaker standing in front of hotel, as they leave for Princess Margaret's wedding, May, 1960.

Prime Minister Jawaharlal Nehru of India waving at front door of #10 Downing Street, during the Commonwealth Prime Ministers' Conference, London, England.

Studio photo of Edward Diefenbaker, brother of William Diefenbaker, as a young man. John Diefenbaker notation on reverse says: "He was my teacher in Haleymea School 1906-1910, when my parents an brother, Elmer, moved on to Saskatoon in Jan. 1910."

Prime Minister Dr. Kwame Nkrumah of Ghana at front door of #10 Downing Street during Commonwealth Prime Ministers' Conference, London, England.

Informal grouping of seven representatives in the garden of #10 Downing Street during ninth Commonwealth Prime Ministers' Conference. Photo includes Walter Nash of New Zealand, Robert Menzies of Australia, Dr. Kwame Nkrumah of Ghana, John Diefenbaker of Canada, Field Marshall Mohammad Ayub Khan of Pakistan, Sir Roy Welensky or Rhodesia and Nyasaland and Eric Louw, Minister of External Affairs for South Africa.

John Diefenbaker chatting with Prime Minister of the United Kingdom Harold Macmillan in garden of #10 Downing Street during ninth Commonwealth Prime Ministers' Conference, London, England.

Artist's impression of "Empress of Canada" on the St. Lawrence River, Chateau Frontenac in background, Quebec City.

"Empress of Canada" leaving dry dock at Vickers-Armstrong Ltd. shipyards, Newcastle-on-Tyne, England, 10 May, 1960.

"Empress of Canada" floating in river off of Vickers-Armstrongs shipyards following its launching, Newcastle-on-Tyne, England, 10 May, 1960.