Find Starfall in Winterspring and speak with Wynd Nightchaser.
In Winterspring, to the north of Felwood, there are many ancient elven ruins. It's a harsh land, but it holds many secrets and places to explore.
My studies here keep me so busy that I have not had the opportunity to travel to Winterspring for some time. But there's no reason why you shouldn't travel there and study the ruins.
While you're there, look for Wynd Nightchaser. He spends most of his time in Starfall and he knows a lot about the area.
