First published in 1913, this book provides an index of early Latin hymns, found in hymnaries from before 1100. Entries contain the following information, where applicable: the incipit, followed by the subject of the hymn, followed by the author, then references to where the text of the hymn can be found in print and manuscript form. The text was originally intended to be the chief feature of a book on Hymns and Canticles in the series of Handbooks of Liturgical Study edited by Professor H. B. Swete and Dr J. H. Srawley, but when completed it proved to be so large that it was necessary to publish it as a separate volume. This book will be of value to anyone with an interest in religious music and the history of Christianity.