From The Grey House:
At the bottom of the steps, he opened the door by entering the code into the keypad. He stepped out and followed the maze of boxes to the only other door in the room. He, Joseph, and Mierka had created the maze and were the only ones who knew how to get in or out. Only the three of them came to this room, anyway. The storage room led to the large second floor bathroom, which was connected to the actual master bedroom. The master bedroom in turn led to another room, which he used as a sitting room. No one was allowed into the sitting room without Vincent’s permission.