Due to my own stupidity, I was stuck in a situation where I had no choice but to remove Durance from my party after recruiting him. After removing him, I cannot find him at all. I've checked in Brighthollow, the stronghold, and the inn in Gilded Vale, and nada.
His quest still shows up in my quest log, so I'm assuming he's still alive somewhere, but he gave no inclination as to where he would go in his departing lines, so either a) I can't find him because I'm overlooking something, b) he's no longer available and the quest is erroneously in my log, or c) he's supposed to be available but is not actually present.
Can provide save games and/or screenshots if necessary.