All the letters are arranged alphabetically by correspondent and by date under each name. A further correspondent has been added to the end of the sequence.

Jacob, Edwin.

Letters, 1848-1849, of Edwin Jacob to John Murray III. Folios 1-6.

Jacob, Elizabeth.

Letter, c 1851, of Elizabeth Jacob to John Murray III. Folios 7-8.

Jacob, George Andrew.

Letter, 1870, of George Andrew Jacob to John Murray III. Folio 9.

Jacob, John.

Letter, 1825, of John Jacob to John Murray III. Folios 10-11.

Jacob, Samuel.

Letter, 1830, of Samuel Jacob to John Murray II. Folios 12-13.

Jacob, Violet Augusta Mary Frederica.

Letter, 1917 and ?1921, of Violet Augusta Mary Frederica Jacob to John Murray IV. Folios 14-15.

Jacob, William.

Letters, 1817-1821, 1823-1825, 1828, 1830, 1832-1833, 1835, 1839 and no date, of William Jacob to John Murray II and John Murray III. Folios 16-69.

Folios 16-17. Letter, 1817, of William Jacob to William Gifford.

Folios 49-50. Letter, 1832, of William Jacob to Edward William Dundas.

Jacob, William Beale.

Letter, 1848, of William Beale Jacob to John Murray III. Folios 70-71.

Jacobi, Justus Ludwig.

Letter, 1849, probably of Justus Ludwig Jacobi to John Murray III. Folios 72-73. 

Jacobs, Joseph.

Letters, 1894-1895, of Joseph Jacobs to John Murray IV. Folios 74-75.

Jacobsen, Friedrich Johann.

Letters, 1819-1820, of Friedrich Johann Jacobsen to John Murray II. Folios 76-82.

Jacobson, Eleanor Jane.

Letters, 1888 and 1890-1891, of Eleanor Jane Jacobson to John Murray III. Folios 83-90.

Jacobson, John.

Letter, 1909, of John Jacobson to John Murray IV. Folio 91.

Jacobson, William.

Letters, 1874, 1880 and undated, of William Jacobson to John Murray III. Folios 92-95.

Jacobs, S.

Letters, 1860-1864 and 1866, of S Jacobs to John Murray III. Folios 96-124.

Folio 121. Note, ?1864, relating to costs of maps engraved by S Jacobs.

Folio 124. Circular, ?1866, advertising the work of Mons. Jacquin. Probably sent as an enclosure of letter, 1866, of S Jacobs to John Murray III, folio 123.