Letter listing for 1790–1799
- Joseph Richardson to John Bannister, 1798
- Rousseau critiqué et satirisé by Jean François de Saint-Lambert, marquis de Saint-Lambert, 1798
- Félicité de Saint-Pierre [née Didot] to Mme Veuve Didot, c. 1798
- Jacques Henri Bernardin de Saint-Pierre to Georges René Le Pelley de Pléville, c. 1798
- Jacques Henri Bernardin de Saint-Pierre to Pierre Marie Claude Robin, 1798–1799
- Jacques Henri Bernardin de Saint-Pierre to Nicolas Louis François de Neufchâteau, comte de Neufchâteau, 1798–1799
- Jacques Henri Bernardin de Saint-Pierre to [unknown], 1798
- Jacques Henri Bernardin de Saint-Pierre to père Henri Jean Baptiste Grégoire, abbé Grégoire, 1798
- Richard Brinsley Sheridan to John Grubb, 1798
- Richard Brinsley Sheridan to Richard Peake, 1798
- Richard Brinsley Sheridan to Richard Peake, 1798
- Richard Brinsley Sheridan to James Aikin, 1798–1800 [a fragment]
- Richard Brinsley Sheridan to James Aikin, 1798–1800
- Richard Brinsley Sheridan to Sir William Geary, 2nd baronet, after 1797
- Richard Brinsley Sheridan to Miss — Hicks, 1798
