Double flageolet

"Two boxwood pipes of equal length, held in wide head joint with two shut-off keys, one being a later replacement. The ivory mouthpiece is missing. Ivory mounted, with silver keys. The left-hand pipe has two keys and an undrilled block for an F key not fitted. The right-hand pipe has three keys, of which one is at the back." Anthony Baines, Catalogue of Musical Instruments in the Victoria and Albert Museum - Part II: Non-keyboard instruments (London, 1998), p. 89.