The sixth flute is taken from Frans Brüggen's private collection, and the original is in ivory with carvings of a boy's face, flowers, grapes and vine leaves. The instrument illustrated is in stained boxwood. The sixth flute is one octave above voice flute pitch, and enjoyed a brief vogue in England with several concertos written for it by John Baston and William Babell [c.1690 – 1723]. Thomas Stanesby Jr. was apprenticed to his father, Thomas Stanesby senior in 1706 and set up his own workshop over the Temple Exchange in Fleet Street near St Dunstan-in-the-West soon after being released from his indenture in 1713. In 1728 he received the Freedom of the Turner's Company and in 1739 he was elected Master.

As the demand for the transverse flute increased Stanesby also made a considerable number of these. He marked his instruments 'STANESBY JUNIOR' or 'STANESBY LONDON'. Other surviving instruments include 38 flutes (of which 25 are ivory), two flutes d'amore, 16 recorders, five oboes and a bassoon. Stanesby's later instruments show a simplification of the older Baroque exterior following the general trend toward the classical woodwind design. Typical examples are a few recorders showing a slender profile with a footpiece similar to those of transverse flutes of the time, omitting the bulbous bottoms of recorders made by himself, his father, and others a generation earlier