Thys Yool is a four-part programme of medieval music in which four images central to the Christmas story are brought together. Beginning with a sometimes melancholy picture of earth-bound humanity (Winter and Wassail), the record moves through nativity songs (A Child Is Born) towards the point at which Christian and pagan traditions come together in an adoration of the Virgin which is often expressed in the passionate language of the courtly lo ver. A sense of human perceptions being profoundly altered by the events of Christmas is evoked in Mary’s Son, Goodwill on Earth and a French 12th century conductus touches on the theme of Rebirth.