Organ pipes (plurale tantum)
Term privately used by William ("Willie") Rowsome, Leo's father; NB (plurale tantum): The term is also used when referring to 1 instrument only.
Baines, Anthony: Woodwind instruments and their history [1957]. With a foreword by Sir Adrian Boult. London, 1962 (2), p.350.
♫ Ceırníní Cladaıġ CC11 (The drones and the chanters: Irish pipering [1971; Sleeve text: Anthony Baines]).