All the letters are arranged alphabetically by correspondent and by date under each name.

Clark, Frederick L.

Letter, 1845, of Frederick L Clark to John Murray III. Folios 1-2.

Clark, George Thomas.

Letters, 1836, 1838-1839, 1843-1844, 1848-1850, 1853-54, 1859, 1866-1872, 1880, 1883-1887, 1889-1891 and 1893-1895, of George Thomas Clark to John Murray II, John Murray III and John Murray IV. Folios 3-132.

Clark, Godfrey Lewis.

Letter, 1896, of Godfrey Lewis Clark to John Murray IV. Folios 133-134.

Clark, Imogen.

Letters, 1901 and 1903, of Imogen Clark to John Murray IV. Folios 135-141.

Clark, James.

Letters, 1836, 1851, 1854, 1857, 1868-1870 and undated, of Sir James Clark to John Murray II, John Murray III and Robert Francis Cooke. Folios 142-204.

Clark, Janet Macdonald.

Letter, 1909, of Janet Macdonald Clark to John Murray IV. Folios 205-206.

Clark, John.

Letter, 1819, of John Clark to John Murray II. Folios 207-208.

Clark, John Forbes.

Letters, 1844, 1846 and undated, of Sir John Forbes to John Murray III. Folios 209-222.

Clark, John Willis.

Letter, 1887, of John Willis Clark to John Murray III. Folios 223-224.

Clark, Samuel.

Letters, 1863-1864, 1870 and 1874, of Samuel Clark to John Murray III. Folios 225-241.

Folios 238-239. Letter, 1874, of John Murray III to Samuel Clark.

Clarke, Thomas.

Letter, 1833, of Thomas Clarke to John Murray II. Folios 242-243.

Clark, William George.

Letters, 1850 and 1856, of William George Clark to John Murray III. Folios 244-249.

Folios 246-247. Letter, 1856, of William George Clark to Sir Francis Galton.

Clark, William Inglis.

Letter, 1901, of William Inglis Clark to John Murray IV. Folios 250-251.