Very helpful Jazzy. Thank you
Just to avoid someone else the headache. If you give Boss Bazzelflange or Bizmo the Hearthstone for the Bruce quest, it will disappear from your bag. Setting your home on any innkeeper will generate a new hearthstone in your bag.
In 8.3 Quakenbush is now alive when you first enter. He dies (and the quest becomes available) after you complete 2 fights