help me, lazyweb

I happened across a conversation (which, believe me, you do not want to read) which brought out the old chestnut, "Where are the female Beethovens?"

Now, I seem to remember that at some point someone (spurred by this sort of question) had a look back and discovered that there were actually a number of great female composers at the time; they were just mostly ignored at the time and continue to largely be ignored today. Unfortunately, I can't seem to find anything about this online, but I'm pretty sure I didn't imagine it. Does anyone else have any idea what I'm talking about?

(Another response is along the lines of Virginia Woolf's essay on Shakespeare's sister, but that's not what I'm thinking of.)