The letters have been arranged alphabetically by correspondent surname.

Letters of Alfred Thayer Mahan to George Prothero, 1912-1913: folio 1-7;

Letters of Frederic William Maitland to George Prothero, 1901-1905: folios 8-17;

Letters of William Hurrell Mallock to George Prothero, 1900-1902: folios 18-23;

Letter of Alfred Marshall to George Prothero, 1908: folios 24-28;

Letter of David Mather Masson to George Prothero, 1902: folios 29-30;

Letters of Charles Arthur Mercier to George Prothero, 1914: folios 31-35;

Letters of Alfred Milner, Viscount Milner, to George Prothero, 1907-1911: folios 36-39;

Letters of William Flavelle Moneypenny to George Prothero, 1909-1911 and undated: folios 40-49;

Letters of Ernest Bruce Iwan Muller to John Murray [IV] and George Prothero, 1909: folios 50-54;

Correspondence of, to and relating to Sir Henry Norman, 1904, consisting of:

pages from ‘World’s Work’ edited by Henry Norman: folios 55-57,

letter of Sir Percy William Bunting to George Prothero: folios 58-59,

letter of Arthur James Balfour to George Prothero: folios 60-61,

draft of a letter of George Prothero to Henry Norman: folio 62,

letter of an anonymous correspondent to George Prothero: folios 63-64,

letter of John Murray [IV] to George Prothero: folios 65-68,

letters and a copy of a letter between Sir Henry Norman and George Prothero: folios 69-70;

letter of Charles Plumptre Johnson to John Murray [IV]: folios 55-76;

Letter of Hermann Gerhardt Karl Oncken to George Prothero, 1914: folios 77-78;

Letters of Violet Paget, pseudonym Vernon Lee, to George Prothero with notes possibly of George Prothero and John Murray [IV], 1913-1914: folios 79-101;

Letters of Alwyn Parker to George Prothero, with a letter of Prothero to Parker and a draft of a letter of Parker to Charles Hardinge, 1st Baron Hardinge, 1917: folios 102-120;

Letters of Archibald Philip Primrose, 5th Earl of Rosebery, to George Prothero, 1900-1915: folios 121-131;

Letters of Ismail Qemali to George Prothero, 1917: folios 132-135;

Letter of Sir Walter Alexander Raleigh to George Prothero, 1902: folios 136-137;

Letter of Salomon Reinach to George Prothero, 1911: folios 138-139;

Letters of Sir William Ridgeway to George Prothero, 1907-1908: folios 140-142;

Letter of Theodore Roosevelt to George Prothero, 1900: folios 143;

Letters of Ernest Brown Bowen-Rowlands to George Prothero, with a copy of a letter of Prothero to Bowen-Rowlands, 1913-1914: folios 144-169.