Dizionario dell'opera, 2008 p. 1437, Piero Gelli, Filippo Poletti (2007) "Nella primavera del 1762 Bach ricevette l'invito a comporre due opere per il King's Theatre di Londra: saranno Orione e Zanaida (entrambe del 1763). Alla fine della stagione Bach decise di rimanere stabilmente a Londra: in Inghilterra ..."
Studies in Music from the University of Western Ontario, p. 99 (1986) "Zanaida, Bach's second London opera, was first performed on 7 May 1763, at the King's Theatre in the Haymarket. As with Orione, Bach's first opera for London, the libretto was written by Giovanni Bottarelli. There were six performances of ..."
W. A. Mozart, p. 41, Hermann Abert, Cliff Eisen (2007). "Orione and Zanaida proved spectacularly successful, and Bach was appointed music master to Queen Charlotte on a salary of £300."
