A seminal text in the study of Anglo-Saxon musical and liturgical practice, compiled in the early eleventh century and added to until the early twelfth, the Winchester Troper is published in a colour facsimile of the manuscript. The introduction explains how and why the book was made, and how its liturgical contents were designed. Studies of the hands of over fifty text scribes are accompanied by the first full account of Anglo-Saxon musical notation, and a study of the most innovative element of the collection, a series of 174 organa, representing a musical practice not recorded elsewhere in Europe before the thirteenth century.