Sacred Prey, Hunt Profane [Quest]

Text of the Quest:

An Altmer doing research in Treehenge found some cultists poaching mammoths at the shrine. Before she was killed by the Worm Cults poison, Aniaste asked for my help in recovering the ivory they took.

Aniaste: To think, all of our research ... ruined! It's all those savage cultists' fault!
Hero: Are you hurt?
Aniaste: Never mind me! It was a balance, a sacred trust. The Worm Cult came and broke that trust with the mammoths, and now .... We were simply observers! But they struck, destroying countless documents
Hero: The cultists attacked you? Or the mammoths?
Aniaste: The cultists! Aren't you listening? No time! Take whatever ivory you can find to Vanendil. And my notes - he'll want them. The cultists took so many carvings for their own purposes. Got to retrieve them somehow. The poison ... my time has come.
Hero: I can take these, but... is there anything I can do to help you?

Vanendil: Wasteful practice. Abhorrent! Oh, pardon. 1 did not see you arrive. Are you another pilgrim to Treehenge? Be wary of the cultists. There is no telling when they may strike.
Hero: Aniaste sent me to find you. I have some ivory .... Goodbye.
Vanendil: Excellent. The cultists use the mammoths' ivory for fetishes in their dark rituals. And what of Aniaste? Will she be along shortly?
Hero: She didn't make it. Goodbye.
Vanendil: Oh. I see. There'll be time enough to mourn her, after my work is complete. The cultists carve the ivory at their camp. Acquire their ceremonial knife, and we can put a stop to this!
Hero: I can try.

Vanendil: Fascinating. You see them, don't you? This will make a marvelous addition to my studies.
Hero: You mean the ghostly mammoths, I expect?
Vanendil: Indeed! Well, perhaps my time is not yet at an end here. I cannot leave such a phenomenon undocumented. Thank you for your aid in uncovering these creatures. Their suffering is regrettable, but I will see to it that it is not forgotten.
Hero: Complete Quest.