The Letter Book of Thomas Hill forms one of the most significant survivals of English merchant papers for the seventeenth century. It provides fascinating insights into the world of English merchants at the time of the Restorationof Charles II. It shows not just the importance of family relationships to commerce within the South West of England, but also how these relationships were crucial to conducting trade with continental Europe and across the Atlantic. Thomas Hill's acquaintances included not only other merchants but also well-known men such as Samuel Pepys.