There are 2 Thomas Key (c1776-1852) bassoons in the Hichwa-Rachor database. The firm flourished in London a1805 until 1858, when it was sold to Rudall, Rose & Carte. In addition to being a large woodwind and brass instrument maker (in the 1830s he had 40 men solely making brass instruments) he also was a music publisher.
Thomas Key Literature
Myers, Arnold. Historic Musical Instruments in the Edinburgh University Collection, Vol. 2, Part E, Fascicle ii: Bassoons. p. 12.
Jansen, Will. The Bassoon: Its History, Construction, Makers, Players and Music. Frits Knuf, 1978, Vol. 1, p. 411.
Waterhouse, William. The New Langwill Index. London: Tony Bingham, 1993.
Young, Phillip. Loan Exhibition of Historic Double Reed Instruments. August 1988, p. 69.