At the top of the house is a billiards room, crowned by the oval window seen on the facade in an earlier photo. The entry to the room is through this pillared set of library shelves. The antique ...

4×3=12. Select 12 to solve the puzzle. The Billiards Room has a dartboard in the back-right corner when you enter. Interacting with it allows you to choose a number — if you look at the board ...