Re: Concerning Bacchanalia
The Bacchanalia did permeate down from the Hellenes, yes, but whether it originated there I don't know - it's basically a later term to denote the festivals of the 'Wine God', i.e. Dionysus in the Greek pantheon.
I haven't done much looking over these sources, so I don't know if they're acceptable, but use them as a jumping off point.
http://homepage.mac.com/cparada/GML/MAENADS.html
http://keur.eldoc.ub.rug.nl/FILES/we.../6585/6585.pdf
http://www.hfac.uh.edu/mcl/classics/...uals_Dion.html