OK, I've got 3 of 4 Aetherium discs. However, when I display the quest and press X for the map, I hear a disappointing "clunk." I hate when that happens. I can't do a seance to ask the ghost who's been assisting. I can't make out the ghosts's journal entry clearly enough to get help from the map (real bad eyes). Where the heck do I go for the last one? Thanks much.