"Sept Ans à L'Opéra" looks very interesting and colourful, from what little I saw of it (a wry comment that some of the male artistes also married off the stage, but none of them became millionaires as a result! https://books.google.co.uk/books?id=2NVZAAAAcAAJ&pg=PA180 I didn't realise the famous Taglioni had become a Comtesse...)

Somewhere in that "fifteen weeks of phantom" stuff there is a substantial missing passage concerning the Persian attending a performance at the Opera, as well, but I'm afraid I didn't put myself to the labour of finding it :-(