Letter listing for 1790–1799
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Penelope Sophia Pennington [née Weston], 28 September 1791
- père André Morellet, abbé Morellet to William Petty, 1st marquess of Lansdowne [2nd earl of Shelburne], 29 September 1791
- Charles Lennox, 3rd duke of Richmond to Thomas Westley, October 1791
- Thomas Reid to Edward Tatham, October 1791
- Richard Brinsley Sheridan to parties concerned about the Dormant Patent, 1 October 1791
- Rosalie de Constant to Jacques Henri Bernardin de Saint-Pierre, 4 October 1791
- William Cowper to Samuel Rose, 4 October 1791
- William Petty, 1st marquess of Lansdowne [2nd earl of Shelburne] to Jeremy Bentham, 5 October 1791
- Jacques Henri Bernardin de Saint-Pierre to Marie Louise Françoise de Pont Wullyamoz [née Burnand], 7 October 1791
- Anne Marie Marthe Elisabeth Louise Françoise de Marguerye [née Dupérier-Dumouriez] to Anne Achille Alexandre Blondel, chevalier de Nouainville, after 8 October 1791
- Sir Samuel Romilly to Jeremy Bentham, 8 October 1791
- Lucette Chappell to Jacques Henri Bernardin de Saint-Pierre, 9 October 1791
- William Petty, 1st marquess of Lansdowne [2nd earl of Shelburne] to Jeremy Bentham, 9 October 1791
- Helen Maria Williams to Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury], 12 October 1791
- Charles Michel de Villette, marquis Du Plessis-Villette to Société des Jacobins, 13 October 1791