Oh, you might have had the same problem I did. The next part of the quest is in the Archer's guild. The quest doesn't actually show up on the map. You have to talk to the guy at the very back, and he lets you into an isolated room (kinda like the waking sands or rising stones) and there will be another guy in there who will give you the next part of the quest. Talk to these guys even if the quest marker does not appear over their heads. My game was glitched and I had not indication that they were tied to the quest at all, but once I spoke with them they gave me the next part.