'''Symphony No. 43''' in E-flat major, Hoboken I/43, is a symphony by Joseph Haydn. Since the nineteenth century it has been referred to by the subtitle "Mercury".Antony Hodgson, ''The Music of Joseph Haydn: The Symphonies''. London: The Tantivy Press (1976): 72 The symphony was composed by 1771. It is scored for two oboes, bassoon, two horns and strings.H. C. Robbins Landon, ''The Symphonies of Joseph Haydn''. London: Universal Edition & Rockliff (1955): 680.
The work is in four movements:
#Menuet & Trio, 3/4
H. C. Robbins Landon describes the slow movement "as a chamber symphony opens with muted strings". It is the only movement of any of Haydn's symphonies to be in the key of A flat major.