This collection consists of letters sent and received by Hester Lynch Piozzi, with a wide variety of correspondents. The letters were collected gradually by Donald and Mary Hyde on the autograph market over a long period of time, and do not constitute a complete archive. 117 different correspondents are represented, with a total of 182 letters: 115 written by Piozzi, and 67 received. The collection includes seven letters to Samuel Johnson, including two versions of the important 1784 June 30 letter informing him of her impending marriage to Gabriel Piozzi, and her final 1784 July 4 letter to Johnson, essentially terminating their long friendship. The collection includes correspondence with other key members of the Johnsonian circle: one letter from Giuseppe Baretti; five letters to James Boswell; four letters to Charles Burney; five letters to Fanny Burney; one letter from Elizabeth Montagu; and one letter from Sir Joshua Reynolds. Many of the other letters also mention Johnson. Several other frequent correspondents are represented in the collection. Included are six letters to Reynold Davies, tutor of her adopted son John Salusbury Piozzi Salusbury; seven letters to the Rev. George Henry Glasse; and eight letters to Penelope Sophia Weston Pennington.