Ok so as most of you know, the quest "The Voice from the water" is bugged and cant be finished by normal means.
The only fix so far is to open your console and type Setstage nq15 250
The quest will be finished and you will get experience and a key to a strongbox wich is located on the table of the ground floor (small iron box).
Hope this helps you guys, i googled the shit out of it so i could finish that damn quest.
also @admins : next time someone reports that bug, redirect him to this topic, i did not get a answer which was helpfull last time.
(please move to the correct section if this is the wrong one)