O magnum mysterium : à 4 /
Byrd, William,1539 or 1540-1623.
Ayre, Alex.
Chesham : Alex Ayre Music Services,
c2000.
Originally a motet for 4 voices.
Presumably ed. by Alex Ayre.
Cover title.
Includes "Practice sheet for 16th century notation."
Motets
String quartets (Viols (4)), Arranged
Woodwind quartets (Recorders (4)), Arranged