All the letters are arranged alphabetically by correspondent and by date under each name.
Letter, 1813, of George Cook to John Murray II. Folios 1-2.
Cook, John Douglas.
Letters, 1834, 1836-1840 and 1842, of John Douglas Cook to John Murray II and John Murray III. Folios 3-41.
Folios 27-28. Letter, 1839, of Alfred James Peter Lutwyche to John Douglas Cook. Sent as an enclosure of letter, 1839, of Cook to Murray.
Cook, Keningale Robert.
Letter, 1885, of Keningale Robert Cook to John Murray III. Folios 42-43.
Letter, 1916, of Mabel Cook to John Murray IV. Folios 44-45.
Cook, Theodore Andrea.
Letters and postcard, 1899-1903, 1911-1912, 1916-1918 and 1922, of Sir Theodore Andrea Cook to John Murray IV and Alexander Henry Hallam Murray. Folios 46-87.
Folio 48. Note with estimate for costs of publishing two pamphlets for Sir Theodore Andrea Cook.
Folios 64-65. Letter, 1903, of Sir Edwin Ray Lankester to John Murray IV.
Folios 68-70. Invitation and envelope, 1904, from John Murray IV addressed to the Editor of the St James Gazette.
Folios 83-84. Letter, 1918, from Sir Adolphe Abrahams to Sir Theodore Andrea Cook. This was sent as an enclosure of letter, 1918, of Cook to Murray, folio 82.
Letter, 1835, of Walter Cook to John Murray II. Folios 88-89.