Letter listing for 1780–1789
- Thomas Warton to Charlotte Warton, 27 March 1787
- Jean Baptiste Gellée de Prémion to Jacques Henri Bernardin de Saint-Pierre, 28 March 1787
- Corilla Olimpica [Maria Maddelena Morelli Fernandez] to Giovanni Cristofano Amaduzzi, 28 March 1787
- Caroline Stéphanie Félicité de Genlis, comtesse de Genlis [née du Crest de Saint-Aubin] to Jacques Henri Bernardin de Saint-Pierre, 29 March 1787
- Caroline Stéphanie Félicité de Genlis, comtesse de Genlis [née du Crest de Saint-Aubin] to Jacques Henri Bernardin de Saint-Pierre, April 1787
- Caroline Stéphanie Félicité de Genlis, comtesse de Genlis [née du Crest de Saint-Aubin] to Jacques Henri Bernardin de Saint-Pierre, April 1787
- Jan Ingenhousz to Doctor Richard Price, 2 April 1787
- Richard Kirwan to Louis Bernard Guyton de Morveau, 2 April 1787
- Corilla Olimpica [Maria Maddelena Morelli Fernandez] to Giovanni Cristofano Amaduzzi, 3 April 1787
- Doctor Richard Price to Isaac Hawkins Browne [the younger], 3 April 1787
- père André Morellet, abbé Morellet to William Petty, 1st marquess of Lansdowne [2nd earl of Shelburne], 5 April 1787
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Samuel Lysons, 5 April 1787
- Benjamin Rush to Doctor Richard Price, 6 April 1787
- Jacqueline Marie Mercier Dupaty [née Bidermann] to Jacques Henri Bernardin de Saint-Pierre, Easter between 1787 & 1792
- père André Morellet, abbé Morellet to William Petty, 1st marquess of Lansdowne [2nd earl of Shelburne], 11 April 1787
