Correspondence with Hart-Davis, Duff Cooper’s nephew and director of Rupert Hart-Davis, Limited, Publishers, on subjects including: the deaths of Lady Diana’s parents; playing hostess to King George VI and Queen Elizabeth at the British Embassy in Paris [France]; the death of Duff Cooper; the writing and publication of Lady Diana’s memoirs, "The Rainbow Comes and Goes"; "The Light of Common Day" and "Trumpets from the Steep"; Lady Diana’s finances; Duff’s books; the Duff Cooper Memorial Fund, for an annual prize for literature at the University of Oxford and for a plaque in his memory in St Paul’s Cathedral.

Other correspondents (mainly on the Duff Cooper Memorial Fund and Lady Diana’s memoirs) include: Sir [Cecil] Maurice Bowra, Warden of Wadham College, University of Oxford; Isaiah Berlin; 3rd Lord Rothschild (5); Michael Stancliffe, Rector of St Margaret’s, Westminster; Sir Harold Nicolson; Clementine Churchill; [Maurice] Harold Macmillan, Prime Minister [later 1st Lord Stockton]; Walter Matthews, Dean of St Paul’s (4); 2nd Lord Mottistone, Surveyor of the Fabric of St Paul’s [earlier Henry John Seely] (2); Christopher Hussey, Country Life Limited; Spencer Curtis Brown, Chairman of Curtis Brown Limited, literary agents (3); 4th Lord Revelstoke [earlier Rupert Baring]; Cecil Beaton; Enid Bagnold (reviewing Lady Diana’s memoirs).

Also includes a tribute to Sir Winston Churchill by Lady Diana and a letter to Hart-Davis from Susan Mary Patten on Duff’s death.