The text (identified by Anthony Hicks) is from Act I of Pietro Metastasio's "Alessandro nell'Indie". Various settings of this opera were staged in London between 1756 and 1789, including Anfossi Pasquale's (1779). The Catalogue of printed music in the British Library to 1980 (London: K. G. Saur, 1981) details music for various pasticci, dating from  to .
Tempo: 6/8 (Andante)
Medium: 2 S, bc