Hey badgesareus, in the German version of Arktwend, the quest ends at the skeleton with a journal entry along the lines of "I should give up that vain search", and you can go back to the prior in Stormwend who'll give you the next quest. Now I'm not sure if the English version - or The Arktwend Overhaul - has extended the quest line. Did you try to return to the prior and talk to him?