Letter listing for 1780–1789
- Charles Eugène Gabriel de La Croix de Castries, marquis de Castries to Jacques Henri Bernardin de Saint-Pierre, 28 August 1785
- Gustavus III, king of Sweden to Marie Charlotte Hippolyte Boufflers-Rouverel, comtesse de Boufflers-Rouverel [née de Campet de Saujon], 30 August 1785
- Jean Ranson to Frédéric Samuel Osterwald, 30 August 1785
- Gilles Pierre Avoyne de Chantereyne to Anne Achille Alexandre Blondel, chevalier de Nouainville, 31 August 1785
- Charles Theveneau de Morande, chevalier de Morande to Pierre Augustin Caron de Beaumarchais, September 1785
- Jean François de La Harpe to Count Andrei Petrovich Shuvalov, 1 September 1785
- Pierre Augustin Caron de Beaumarchais to Charles Alexandre de Calonne, vicomte de Calonne, 1 September 1785
- Richard Kirwan to Louis Bernard Guyton de Morveau, 1 September 1785
- James Boswell to Sir John Dick, baronet, 2 September 1785
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to George Nassau Clavering-Cowper, 3rd Earl Cowper, 4 September 1785
- François Pierre de La Motte-Baracé, marquis de Senonnes to Anne Achille Alexandre Blondel, chevalier de Nouainville, 11 September 1785
- Robert Reid to Adam Smith, 11 September 1785
- François Mesnard de Conichard to Jacques Henri Bernardin de Saint-Pierre, 12 September 1785
- Charles Gravier, comte de Vergennes to Louis XVI, king of France, 13 September 1785
- Jacques Henri Bernardin de Saint-Pierre to Pierre Michel Hennin, 13 September 1785
