Letters from HLP to Harriet Maria Pemberton, who married HLP's adopted son, John Salusbury Piozzi Salusbury, in November 1814 and in 1817 became Lady Salusbury.
The volumes comprise:
- Volume 1 (Eng MS 592), numbers 1-65, 1813-1817;
- Volume 2 (Eng MS 593), numbers 66-130, 1817-1821.
Numbers 17, 82 and 109 have notes from John Salusbury Piozzi Salusbury; number 21 has a note to Mrs [Anna Maria] Pemberton (Harriet's mother); number 130 is incomplete.