1. Lord Butler, The Art o f the Possible, Hamish Hamilton (London), 1971: 242.
2. Anthony King, ‘Britain: The Search for Leadership’ in William Andrews (ed.), European Politics 1: The Restless Search, Van Nostrand (Princeton, New Jersey), 1966:48.
3. David Butler and Anthony King, The British General Election of 1964, Macmillan (London), 1965: 21.
4. George Hutchinson, The Last Edwardian at No. 10, Quartet Books (London), 1979: 122.
5. Nigel Fisher, The Tory Leaders: Their Struggle for Power, Weidenfeld and Nicolson (London), 1977: 105.