I've created a new location, but I'm uncertain how to finish off the idea. Jackob and the Mill are two sides of the same coin. Jackob is the keeper and the Mill is the monster.
So are Tobby and his wife in on the plot, or are they innocent bystanders - or worse - are Tobby and his wife some sort of echos of the people who've always run the place? Maybe illusions, or ghosts that show up whenever both the miller and his wife are dead. They relive the same life over, and over again.
I don't want it to be a curse. This is, somehow, the way it's supposed to be. But - what happens if the monster is set free? And how do you do that? Kill Jackob?