Letter listing for 1820–1829
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Doctor John Shute Duncan, 7 March 1821
- Pavel Chichagov to Jeremy Bentham, 12 March 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Harriet Maria Salusbury [née Pemberton], 14 March 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Frances d’Arblay [née Burney], 15 March 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Harriet Willoughby [née Fox], 16–18 March 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Harriet Maria Salusbury [née Pemberton], 21 March 1821
- Richard Rush to Jeremy Bentham, 22 March 1821
- Clara Mary Jane Clairmont to George Gordon Noel Byron, 6th Baron Byron, 24 March 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Doctor Sir James Fellowes, 24 March 1821
- Jeremy Bentham to Sir Samuel Bentham, 28–30 March 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Harriet Maria Salusbury [née Pemberton], 1 April 1821
- Jeremy Bentham to John Cartwright, 9 April 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Lady Margaret Williams, 9 April 1821
- John Adams Smith to Jeremy Bentham, 9 April 1821
- Hester Lynch Piozzi [formerly Mrs Thrale; née Salusbury] to Penelope Sophia Pennington [née Weston], 10 April 1821