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

Biddulph, Michael, 1895: folios 1-2;

Biddulph, Michael Anthony Shrapnel, 1879: folio 3;

Biddulph, Robert, 1903: folios 4-8;

Biddulph, Thomas, 1866-1873: folios 9-12:

includes letter, 1873, of Thomas Biddulph on behalf of Queen Victoria to John Murray III: folio 12;

Bidlake, John, 1803-1808: folios 13-48:

includes letter, 1808, of Nathaniel Howard to John Murray II: folios 47 verso-48;

Bierfreund, (Lorentz C.) Theodor, 1899: folios 49-50;

Bigg, Agnes, 1901: folios 51-52;

Bigg, Henry, 1901: folios 53-54;

Biggar, Oliver, 1917: folios 55-56;

Biggar, Walter, 1813: folios 57-72;

includes letter, 1813, of Edward Spence to John Murray II: folio 66.