Go to Felix in the boiler room and ask about the optical illusion walls in the Living Room. Obtain blueprint from Felix. Go back to living room, and touch the walls. The Blueprint helps to solve the puzzle. The L stands for left wall, and the R stands for right wall. For example, R33 is right wall, (starting from top left) count three tiles over, and three tiles down, and push the tile. (L73, L55, L34, L35, L86, L81) (R33, R73, R53, R26, R44, R65). The left wall spells an M. The right wall spells the letter Z. Solving the puzzle will open another mechanism of the Grandfather clock.
Then head to room 108 Nolben's room. Ask Nolben about Charlotte. Then go to room 101 and talk to Rosalie. Then go to Catherine's room and encounter the family doctor, Ferdinand. Ask her all the questions, then go to the study on second floor. Ask Giz and Victoria questions about Charlotte. Then go to the Maid's room in the Basement and ask Leah. Ask Leah where she was that night. Then go to Ervan's room. After talking to him, make sure you don't enter his lavatory.
Then go to the banquet hall. Then go to the Bar in the Basement and meet Sandra for some tea and ask her all the questions. Then go to room 101 to get the square wrench from Felix. Then head back to the Garden, back to the basement of the tower, and use the Square Wrench to unlock. It is incomplete, so you have to head back and see Felix in the basement in the boiler room and obtain pipe parts. Then head back to the Tower Basement and match the pipe parts, then pull the lever on the right wall. Go down another level to the circular chamber.
Upon entering, go into the left door up to the teleport. The clues are hidden in the stone plates on the left and right. The number is out of order, and it goes 2,1,3,2,3. To solve this puzzle,
