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

Hay, Robert William.

Letters, 1813-1816, 1820, 1822-1827, 1829-1831, 1838-1840, 1842, 1844-1846, 1850-1851, 1853, 1855-1856, 1858 and undated, of Robert William Hay to John Murray II, John Murray III and Robert Francis Cooke. Folios 1-148.

Folios 67-68. Letter, 1826, of John Murray II to Robert William Hay. A note of reply from Robert William Hay to John Murray II is located on f.67v.

Folios 75-76. Letter, 1827, of James Jermyn to Francis Bazett Grant. Sent as an enclosure of letter, 1827, of Robert William Hay to John Murray II, folios 73-74.

Folios 120-121. Letter, 1846, probably of Richard Berens to an unidentified recipient named Leyden.

Hay, Stuart.

Letter, 1831, of Stuart Hay to John Murray II. Folios 149-150.

Hay, Thomas.

Letter, 1905, of Thomas Hay to John Murray IV. Folio 151.

Hay, William Archibald Dalrymple-.

Letters, 1928, of Sir William Archibald Dalrymple-Hay to John Murray IV. Folios 152-155.

Hay, William Delisle.

Letter, 1884, of William Delisle Hay to John Murray III. Folios 156-157.

Hay, William George.

Letter, 1819, of William George Hay, 18th Earl of Erroll, to John Murray II. Folios 158-160.

Folio 160. Letter, 1819, of an unidentified correspondent to William George Hay, 18th Earl of Erroll. Sent as an enclosure of letter, 1819, of William George Hay to John Murray II, folios 158-159.

Hay, William Montagu.

Letters, 1893 and 1898-1899, of William Montagu Hay to John Murray IV. Folios 161-165.

Hay and Lyall.

Letter, 1899, of Hay and Lyall to John Murray IV. Folio 166.