The modern liturgical movement owes a great debt to Solesmes monk DomEugene Cardine (1905-1988), whose tireless research in the ancientmanuscripts uncovered the elusice secrets of Gregorian Rhythm, thusrevealing some of the original pristine beauty of Gregorian chant. In thisvolume, Dom Cardine sums up the origin, decline and restoration of thechant, and challenges researchers to continue his work.