Sent there to investigate the Necromancers? So there's a sort of sarcophagus outside and on a wiki I read there's three ways to trigger the mission 1) Wait - didn't work for me, I saw the pillar of light but nothing happened and the quest didn't update 2) Read a note off one of the necromancers inside the cave - Killed them all and none of them had this note on them. 3) Use soultrap on the sarcophagus - well I now have the spell but not skill enough in that school to cast it and unless I level up I can't train in it, even if I knew where I could train in that school.

I hope I'm just missing something - can someone tell me how to proceed with this?