Nothing close to a complete (or even very good) answer, but there is this story about Queen Elizabeth I:

"This Earle of Oxford, making of his low obeisance to Queen Elizabeth, happened to let a Fart, at which he was so abashed and ashamed that he went to Travell [for] 7 yeares. On his returne the Queen welcomed him home, and sayd, My Lord, I had forgott the Fart." - From John Aubrey’s Brief Lives (1693).

Part of the background, as I heard it, is that Elizabeth liked crude language, possibly because it made her appear more masculine, so it seems like farting was more "unladylike" than completely unacceptable at that time.