The English legal manuscripts in Cambridge University Library form one of the most important collections in the world. The principal treasures derive from the renowned library, containing over 230 volumes, collected by John Moore(d.1714), Bishop of Ely, presented to the University by King George I in 1715. It includes some of the old manuscripts collected by Francis Tate (d.1616), and the working manuscript library of Mr Justice Nicholas (d.1667). The collection also contains medieval statute-books, year-books, medieval and early modern readings and moots in the inns of court, and law reports from the Tudor period down to the reign of Charles II, together with examples of every other major type of manuscript law book in use in England prior to the eighteenth century. As well as being an essential finding-aid, this new catalogue includes a description of the contents of each manuscript, bibliographicalnotes on the text (listing hundreds of related manuscripts in other libraries), and full codicological descriptions of the medieval manuscripts by Dr Jayne Ringrose. No similar catalogue of English legal manuscripts has ever beenpublished before. Professor J.H. BAKER is Professor of English Legal History at Cambridge University.