Letter listing for 1820–1829
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Penelope Sophia Pennington [née Weston], 25 July 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to William Augustus Conway, 27 July–3 August 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Sir John Salusbury Piozzi Salusbury [née Piozzi], 28 July 1820
- Charles Gaulis Clairmont to Mary Wollstonecraft Shelley [née Godwin], 29 July–September 1820
- William Plumer [junior] to Jeremy Bentham, 31 July 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Penelope Sophia Pennington [née Weston], 3 August 1820
- Jeremy Bentham to Sir Samuel Bentham, 11 August 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Reverend Daniel Lysons, 11 August 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Penelope Sophia Pennington [née Weston], 13 August 1820
- Sarah Austin [née Taylor] to Jeremy Bentham, 15 August 1820
- Edward Blaquiere to Jeremy Bentham, 15 August 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Harriet Maria Salusbury [née Pemberton], 21 August 1820
- Edward Blaquiere to Jeremy Bentham, 22 August 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Harriet Willoughby [née Fox], 25 August 1820
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Penelope Sophia Pennington [née Weston], 26 August 1820