I just saw two performances of Britten's The Turn of the Screw. The two casts are directed in two different readings of the famously open-ended story by Henry James.
Now very intrigued and will probably do some digging into both opera and story (which I had read, but in hiiigh schooool so long ago).
In preliminary stumblings, I found this, a video version featuring, among others, Helen Donath as the singing voice of the Governess:
Of course, I also have to share more upbeat Donath!