Letter listing for 1800–1809
- Jean François Ducis to Jacques Henri Bernardin de Saint-Pierre, 8 April 1805
- Jeremy Bentham to Charles Abbot, 1st Baron Colchester, 10 April 1805
- Alexander I, czar of Russia to Sir Samuel Bentham, 11 April 1805
- Richard Brinsley Sheridan to Hester Jane Sheridan [née Ogle], 17–18 April 1805
- Jane Austen to Cassandra Elizabeth Austen, 21 April 1805
- Adam Ferguson to Bell & Bradfute, 22 April 1805
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Reverend Thomas Sedgwick Whalley, 24 April 1805
- Jacques Henri Bernardin de Saint-Pierre to Barthélémy Roger, 25 April 1805
- Jacques Henri Bernardin de Saint-Pierre to Marguerite Charlotte Désirée de Saint-Pierre [née de Pelleporc], 26 April 1805
- père André Morellet, abbé Morellet to Jean François Cailhava d’Estendoux, 27 April 1805
- Jacques Henri Bernardin de Saint-Pierre to Marguerite Charlotte Désirée de Saint-Pierre [née de Pelleporc], 28 April 1805
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Reverend Thomas Sedgwick Whalley, 29 April 1805
- Jean François Ducis to Jacques Henri Bernardin de Saint-Pierre, 30 April 1805
- Jacques Henri Bernardin de Saint-Pierre to Marguerite Charlotte Désirée de Saint-Pierre [née de Pelleporc], 30 April 1805
- Charles James Fox to Richard Brinsley Sheridan, early May 1805