Letter listing for 1790–1799
- Archibald Acheson, Viscount Gosford by Archibald Acheson, 1st Viscount Gosford, 1790
- Archibald Acheson, Viscount Gosford by Archibald Acheson, 1st Viscount Gosford, 1790
- Archibald Acheson, Viscount Gosford by Archibald Acheson, 1st Viscount Gosford, 1790
- [anonymous] to Jacques Henri Bernardin de Saint-Pierre, 1790–1792
- Jeremy Bentham to Adam Smith, 1790
- Jeremy Bentham to Caroline Fox, Caroline Smith [née Vernon] and Elizabeth Vernon, 1790–1791
- “Retour sur lui-même” by Pierre Augustin Caron de Beaumarchais, after 1790
- Lucette Chappell to Jacques Henri Bernardin de Saint-Pierre, c. 1790
- Jean Antoine Gay to Jacques Henri Bernardin de Saint-Pierre, 1790–1792
- Mme — de Gérardin Raseau to Jacques Henri Bernardin de Saint-Pierre, 1790–1792
- Jean Baptiste de Gouy, comte de La Besnardière to Jacques Henri Bernardin de Saint-Pierre, 1790
- Jacques Godefroy Charles Sébastien Xavier Jean Joseph Izarn, marquis de Valady to Jacques Henri Bernardin de Saint-Pierre, 1790–1792
- Geneviève Sophie Le Couteulx du Molay to Jacques Henri Bernardin de Saint-Pierre, 1790–1791
- père André Morellet, abbé Morellet to Romain de Sèze, 1790–1818
- Mlle — Pinabel to Jacques Henri Bernardin de Saint-Pierre, c. 1790