The letters have been arranged alphabetically by correspondent surname. Further correspondence has been added to the end of the sequence.

Letters of John Cann Bailey to George Prothero, 1916 and undated: folios 1-4;

Letter of Arthur James Balfour, 1st Earl of Balfour, to George Prothero, 1908: folios 5-7;

Letter of Gerald William Balfour, 2nd Earl of Balfour, to George Prothero, 1906: folio 8;

Letters of Evelyn Baring, 1st Earl of Cromer, to George Protheo, 1908-1916: folios 9-23;

Letter of Maurice Baring to George Prothero, 1909: folios 24-25;

Letters of James Ellis Barker to George Prothero, 1911: folios 26-30;

Letters, a copy of a letter, and notes of, to and relating to Maurik de Beaufort, including of John Murray [IV] and Bindon Blood, with a typescript Introduction to a proposed book by de Beaufort and a press cutting, 1916 and undated: folios 31-52;

Letter of Joseph Hilaire Pierre Rene Belloc to George Prothero, 1909: folio 53;

Letter of Lewis Saul Benjamin, pseudonym ‘Lewis Melville’, to George Prothero, 1910: folio 54;

Letters of Arthur Christopher Benson to George Prothero, 1907: folios 55-58;

Letter of Robert Laurence Binyon to George Prothero, 1904: folios 59-60;

Letter of Augustine Birrell to George Prothero, undated: folio 61;

Letter of John Edward Courtenay Bodley to George Prothero, 1915: folios 62-63;

Letter of Charles Booth to George Prothero, 1901: folios 64-65;

Letter of Sir Edward William Brabrook to George Prothero, 1908: folios 66-67;

Letters of Andrew Cecil Bradley to George Prothero, undated: folios 68-71;

Letter of Sir Cyprian Arthur George Bridge to George Prothero, 1905: folios 72-73;

Letter of Robert Seymour Bridges to George Prothero, undated, folio 74;

Letter of Donald Brown to George Prothero, 1903: folios 75-76;

Letters of Ferdinand Brunetiere to George Prothero, 1899-1900: folios 77-80;

Letters of James Bryce, Viscount Bryce, to George Prothero, 1901-1908: folios 81-88;

Letter of James Bagnell Bury to George Prothero, 1904: folios 89-90;

Letter of Edward Henry Carson, Baron Carson of Duncairn, to George Prothero, 1907: folios 91-92;

Letters of Algernon Cecil to George Prothero, 1913-1916, undated: folios 93-117;

Letters of Hugh Richard Heathcote Gascoyne-Cecil, Baron Quickswood, to George Prothero, 1904: folios 118-129;

Letter of George Maclagan Chesney to George Prothero, undated: folios 130-132;

Letters of Sir Valentine Ignatius Chirol to George Prothero, 1914-1916: folios 133-146;

Letters of Augustus Hyde Tredway Clarke to George Prothero, 1910-1911: folios 147-161;

Letters of Sir Sidney Colvin to George Prothero, with related letters of John Churton Collins and Harold Hodge and draft replies to same of Prothero, 1902: folios 162-174.

Letters of Reginald Baliol Brett, 2nd Viscount Esher, to John Murray IV, John Murray V, and John Cann Bailey, with a copy letter of John Murray IV and a letter of George Prothero to Brett: folios 175-192.