Music and performance : Hildegard of Bingen's Ordo virtutum -- The Cividale Planctus Mariae for modern performance -- Music in the Beauvais Ludus Danielis -- Alma Redemptoris Mater : the little clergeon's song -- High, clear, and sweet : singing early music -- Palestrina and mannerism -- Five settings of songs attributed to Sir Philip Sidney -- Milton's encomiastic sonnet to Henry Lawes -- George Herbert and the celestial harmony -- The origin and development of quasi-dramatic passion music -- The Roskilde St. John Passion and its suppression -- Vocal production and early music.