Please forgive me for crashing, but I
may be able to help y'all. About a year ago, I bought an old (or do iI say "vintage"?) ADPi Songbook on ebay. There were about 3-4 pages of the whistles of different GLOs - which I found odd! I thought that whistles were part of the Double Secret Ritual Knowledge.
I'm a little stretched out, living between two houses, but if I find it, I'd be happy to PM it to Silver to share.
Panhellenically,