I know. Isn't Tor about science fiction?
Where there's a will, there's a way and writer Mari Ness points out that Heyer's Regency world was really a carefully created fantasy world.
I'm gonna say that's a legit point.
Read her introduction here and then let's all go on to the discussion of The Black Moth.
I'd like to remind everyone that I read The Black Moth on Forgotten Classics, where you may download the episodes (free!).