Destroying the Dark Witnesses [Quest]

Text of the Quest:

Destroying the Dark Witnesses Defeating the Dark Witnesses can only be accomplished by killing the hagraven, Uela. Some of the Wyrd Sisters up near Jackdaw Cove have been searching for where Uela is hiding, but they need help. I should look for one of the Wyresses in Jackdaw Cove.

Tasks

Wyress Delphique: Even together, my sisters and these soldiers can only prevent these Reachmen from advancing further south. Defeating the Dark Witnesses for good will require that someone goes deeper into their territory to kill the Hagraven, Uela.
Hero: Do you know where Uela is?
Wyress Delphique: With the crows as her spies, Uela is everywhere, but the Hagraven's physical form is assuredly deep in Reachmen-held territory. My sisters have been searching for her, but it will take time. The foul creature has wards that block Wyrd magic.
Hero: Perhaps I should go help them.
Wyress Delphique: You would venture up to Jackdaw Cove? Uela's influence has corrupted everything there. It's wretched, but if you are willing, I will not try to dissuade you. Search for my sisters near Jackdaw Cove. Perhaps with your help, Uela can be destroyed.
Hero: I will go to Jackdaw Cove then.

Wyress Freyda: Keep your distance, outsider. The last thing we need is some rock-brained city-dweller bumbling around. Darkness dominates this part of the forest—Uela the Hagraven and her Reachmen are encamped here. For now, at least.
Hero: Wyress Delphique suggested I come here.
Wyress Freyda: She did? I find that hard to believe. Delphique knows how I feel about outsiders. Regardless, whatever your reasons for coming, they'll have to wait.
Hero: Complete Quest.