Talk to Miner Grenwyn to learn of the deaths of his colleagues.
Deliver six ghosts from their terrible fate.
I need your help. My name is Grenwyn. I used to work in the mine. Pirates recently ambushed us and killed all my friends and coworkers Now the ones who were killed are haunting the mine as ghosts. Please go to the mine and deliver their poor souls.
Work West through the mine killing Elven ghosts (see map for their approximate locations).
When all 6 are dead, return to Grenwyn for your reward.
Thank you! Now I can finally sleep again without fear. Here take this reward.
You can then talk to him again for the last quest in the chain, Meeting Geonmahr.