Letter listing for 1810–1819
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Lady Margaret Williams, 29 March 1815
- Richard Brinsley Sheridan to Anna Maria Ogle [née Cowlam], 31 March 1815
- père André Morellet, abbé Morellet to Pierre Louis Roederer, comte Roederer, 2 April 1815
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 2 April 1815
- Richard Brinsley Sheridan to W. Hartley, 5 April 1815
- Richard Brinsley Sheridan to Charles Ward, 7 April 1815
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Reverend Thomas Sedgwick Whalley, 8 April 1815
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Alexander Leak, 11 April 1815
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 12 April 1815
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Alexander Leak, 16 April 1815
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 19 April 1815
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Ann Leak [née Glover], 19 April 1815
- Adam Ferguson to Admiral John Ferguson, 21 April 1815
- Alexander I, czar of Russia to Jeremy Bentham, 22 April 1815
- Prince Adam Czartoryski to Jeremy Bentham, 25 April 1815