All the letters are arranged alphabetically by correspondent and by date under each name. Further folios have been added at the end of the sequence.

Coulton, David Trevena.

Letters, 1851-1854, of David Trevena Coulton to John Murray III and John Gibson Lockhart. Folios 1-97.

Coulton, Sophia.

Letters, 1861-1863, 1866, 1870, 1877 and 1879, of Sophia Coulton to John Murray III. Folios 98-121.

Council of Military Education.

Letter, 1860, signed by Doveton Downes Greentree on behalf of the Council of Military Education to John Murray III. Folio 122.

County of London Volunteer Regiment.

Letters, copy letters, receipts, memorandums and financial records, 1916-1918, relating to the County of London Volunteer Regiment. The correspondents are John Murray IV, Sir Desmond Dykes Tynte O’Callaghan, Robert Offley Ashburton Crewe-Milnes, Nevil Digby Bosworth Smith, Sir Richard Atkinson Robinson, Sir Evan Spicer, Colonel S Ormond and Coutts and Co. Folios 123-185.

Courtauld, Sydney.

Letters, 1869-1870, 1872-1873 and 1875, of Sydney Courtauld to John Murray III. Folios 186-211.

Courtenay, John Brownlee.

Letters, 1878 and 1883, of John Brownlee Courtenay to Joseph Barclay and John Murray III. Folios 212-215.

Courtenay, Louisa Bithia.

Letters, 1844 and undated, of Louisa Courtenay to John Murray III and possibly John Murray IV. Folios 216-219.

Courtenay, William.

Letter, 1845, of William Courtenay, 10th earl of Devon, to John Murray III. Folios 220-221.

Couper, George.

Letter, 1854, of Sir George Couper to John Murray III. Folios 222-223.