I just did a quick Google search and discovered at http://www.sherlockian.net/world/irene.html (sorry -- I WILL take the time to learn how to do blue clickies one of these days) that "Another popular tradition is that Irene Adler was in reality the "Aunt Clara" who figures in the 1920s song "We Never Mention Aunt Clara", as sung to the Baker Street Irregulars by Jim Montgomery. It's rather fun to think so. "I don't think I'd run into that particular piece of information before. and it links to Mudcat/DigiTrad for the words, too.
Linn