In 1994 David Fanshawe composed an extra movement for a new recording of the work , the Dona Nobis Pacem - A Hymn for World Peace , which completed the Agnus Dei . In 1994 Fanshawe composed an additional movement for a new recording of the work , the `` Dona Nobis Pacem - A Hymn for World Peace '' , which completed the `` Agnus Dei '' .