This descriptive catalogue, comprising descriptions of some 364 sources held by 75 institutions and individuals, enumerates the remains of the written musical traditions for the early medieval period of an entire country. Each record is complemented by paleographical and codicological analyses, and the whole by a bibliography, by comprehensive indices of incipits and subjects, and by eight full-page plates. It thus illuminates a facet of medieval England which has never been studied in full and about which we know very little compared to our knowledge of pictorial art and letters. It will be indispensable not only for students of music and liturgy, but for medievalists in general. This book is published in association with the Plainsong and Medieval Music Society. K. D. HARTZELL is Professor of Music Emeritus, University at Albany, Albany, New York.