Location: East Wing, randomized
Rescue Reward: The Revolver (if you haven't already rescued Aunt Emelie)
From the Manual: Sir Andrew Kingstone has provided for your father’s sister for more than thirty years and still stands faithful by her side, in sickness and health, for better for worse.
Uncle Andrew is randomly located inside the East Wing. He'll reward you with his revolver if you rescue him and bring him back to the Sanctuary. If you fail to rescue him, you can still obtain the revolver by rescuing his wife Emelie Kingstone. If you've already rescued Emelie, you get nothing from Andrew other than the satisfaction of a job well done.