We kept getting hints from Parker and from Thaddeus that "THESE are the people you need to talk to", often in very vague terms. And we didn't do that, because Parker and Thaddeus were both dodgy as hell and because we never had any time. And Emyera was definitely working for some organisation that pointedly excluded us from the debriefing.

I suppose over a period of time all these little hints solidified into the idea of a "Sages Guild".