Letter listing for 1810–1819
- Richard Brinsley Sheridan to John McMahon, 25 April 1812
- Cecilia Margaretta Mostyn [née Thrale] to Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury], 26 April 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Alexander Leak, 26 April 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 28 April 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Alexander Leak, 4 May 1812
- Richard Brinsley Sheridan to Sir Vicary Gibbs, 5 May 1812
- Charles Abbot, 1st Baron Colchester to Spencer Perceval, before 11 May 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 15 May 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Clement Mead, 16 May 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 18–19 May 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Clement Mead, 20 May 1812
- Richard Brinsley Sheridan to George IV, king of Great Britain and Ireland, 21 May 1812
- Richard Brinsley Sheridan to Caroline Fox, 24 May 1812
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Reverend Thomas Sedgwick Whalley, 25 May 1812
- Richard Brinsley Sheridan to Richard Colley Wellesley, 1st Marquess Wellesley, 26 May 1812