The tenor, Michael Kelly, wrote a memoir which remains interesting to anyone searching for Mozart stories, particularly about the Marriage of Figaro. (The Austrian Emperor and therefore everyone else in Vienna referred to Kelly as "Ochelli" because "The names of all Irishmen begins with an 'O". Therefore, OChelli he was--in Vienna.)
Lesson #1--never correct the Emperor of Austria if you would like to keep your job at the royal opera house...
Take a little walk into my 18th Century world:
And because it's Nanina Gottlieb's birthday today and because she too--aged 11--sang in this opera: