Edward Bridge acted as agent for John Salusbury and his wife in Wales and most of the letters are from Bridge to them, and chiefly concern business matters. There are two letters to Sir Thomas Salusbury from Bridge, several others to Bridge from various persons, four letters from Mary Bridge and one from Hester Bridge to HLP, and one from Mary Bridge to Henry Thrale. Many letters are endorsed by Dr Samuel Johnson:
- Volume 1 (Eng MS 531), numbers 1-58, 1746-1757;
- Volume 2 (Eng MS 532), numbers 59-113, 1758-1773.