How do you get the treasure underneath bowerstone in Fable 2

You must find and shoot all of the gargoyles in the world. When you do that and get to the chest, it will contain a rotten apple. A joke from the gargoyles. But the real treasure is behind the wall that you have to smash. After you break through, proceed through the hall and eventually you find a chest. This is the real treasure, it is the Rammer.