Letter listing for 1810–1819
- Un témoignage by Ludwig Heinrich Nicolay, c. 1810
- Jacques Henri Bernardin de Saint-Pierre to Jean Pierre Louis de Fontanes, marquis de Fontanes, 1810
- Jacques Henri Bernardin de Saint-Pierre to Marguerite Charlotte Désirée de Saint-Pierre [née de Pelleporc], 1810
- Jacques Henri Bernardin de Saint-Pierre to Antoine Jean Marie Thévenard, 1810–1813
- Richard Brinsley Sheridan to theatre performers, 1810
- Jacques Henri Bernardin de Saint-Pierre and Marguerite Charlotte Désirée de Saint-Pierre [née de Pelleporc] to Virginie de Saint-Pierre, 1 January 1810
- père André Morellet, abbé Morellet to Nicolas Louis François de Neufchâteau, comte de Neufchâteau, 4 January 1810
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Hester Maria Elphinstone, Viscountess Keith [née Thrale], 31 January 1810
- Sir Samuel Romilly to Jeremy Bentham, 31 January 1810
- Jacques Henri Bernardin de Saint-Pierre to Joseph Bonaparte, February 1810
- Jacques Henri Bernardin de Saint-Pierre to Anne Gédéon Lafitte, marquis de Pelleport, 2 February 1810
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Lady Margaret Williams, 9 February 1810
- Richard Brinsley Sheridan to [unknown], 14 February 1810
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 19 February 1810
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 22 February 1810