The libretto, listed at WorldCat (OCLC456913691), gives the date as 23 September 1819, but Loewenberg 1978, col 643, says this is erroneous, rather it was actually performed on 26 October 1819.
Libretto of Torvaldo e Dorliska at WorldCat. OCLC461200086; Loewenberg 1978, col 642.
Although the printed libretto of Otello (WorldCat OCLC79827616) gives the date of the Paris premiere as 31 May 1821, Loewenberg 1978, col 649, gives 5 June 1821.
The printed libretto listed at WorldCat (OCLC458651003) gives the date as 20 April 1822, but Loewenberg 1978, col 629, gives 23 April 1822.
