Included are letters from Sir B. H. Liddell Hart (B/74), A. E. Housman (B/76, B/81), Sir Arthur Quiller-Couch (B/77), 3rd Earl of Leicester (B/81), Ernest de Selincourt (B/81), Charles I. C. Bosanquet (B/79), John Buchan, 1st Baron Tweedsmuir (B/77), Hilda Margaret Pickard-Cambridge (B/81), Lionel E. L. Charlton (B/81), W. Martin Conway, 1st Baron Conway of Allington (B/80), George Stuart Gordon (B/78), Winifred E. L. Hawke (B/80), George Cecil Jaffé (B/77), Kenneth Escott Kirk (B/79), James William Lowther, 1st Viscount Ullswater, Sarah Hamilton Lusk (B/75), Theodore Lyman (B/70), Francis John Lys (B/74), Margaret (Daisy) McTaggart (B/76, B/78, B/80), Robert O. A. Milnes, 1st Marquess of Crewe (B/78), Stephen Charles Neill (B/76); Sir Harold F. P. Percival (B/79), Ernest Murray Pollock, Baron (later Viscount) Hanworth (B/74, B.79), Constance Babington Smith (B/78), Lady Elisabeth Babington Smith (B/75, B/78), Sir George Adam Smith (B/79), Sir William Francis Kyffin Taylor (B/79), John Grosvenor Barrington-Ward (B/75), John Macnaghten Whittaker (B/77), Alexander Wood (B/74), Robert Alderson Wright, Baron Wright (B/81).
A group of 63 letters received by J. R. M. Butler after publication, many from friends of H. M. Butler and J. R. M. Butler as well as members of his extended family. Some of the letters include personal recollections of H. M. Butler. Correspondents include Frances Anne Conybeare, W. J. Conybeare, D. H. S. Cranage, J. A. Cruikshank, Randall Davidson, Albinia Donaldson, T. Field, Edward Graham, Alan Gray, Charles Haddock, John Charles Hill, Sir Arthur Hort, David Macdonald, H. H. Montgomery, G. C. Moore Smith, Edith Wendell Osborne, R. St. John Parry, Godfrey Phillips, Ernest M. Pollock (Lord Hanworth), John Ross, Ronnie Ross, A. E. Shipley, Henry Yates Thompson, George Trevelyan, and P. N. Waggett.
Family correspondents include Sir Cyril K. Butler, Diana Butler, Dorothy Butler, E. M. B. Butler, Sir Geoffrey Butler, George Grey Butler, John Butler, Sir Montagu S. D. Butler, Ralph L. G. Butler, Marie Gray, Antonia Greenwood, Hugh Howson, David Morley-Fletcher, A. Francis Norman-Butler, C. L. Ramsay, G. M. N. Ramsay, Susan E. Ramsay, and Audrey Tower.