After grabbing everything head back to the lobby.
Thief 2 masks third floor door can t open.
Go south to the hallway door.
Figure 1 2 passage between studies.
Sneak around to the north side of the balcony shoot a moss arrow below then use a vine arrow to climb down behind the guard.
Sneak down the hall past the guard turn the corner and go right into the foyer.
1 third floor security room passage in the security control room in the northeast corner of the building look for a switch on the north side of the camera control panel.
Secret 2 switches on wall right of fireplace in third floor studies reveals connecting passageway.
On the balcony shoot a vine arrow into the ceiling and climb to the rafters above figure 2 for the gemstone in the jewelry box figure 3.
This door leads to a control room where you can shut down all 3rd floor cameras but there s also a little half hidden switch below the northernmost camera controls that opens a secret passge back.
Kill the cameras and cross the hall to the ballroom.
Look near the bottom figure 1.
First floor south cross the hall and pick the lock on the security room door.
Secret not counted switch on desk in north study on third floor reveals.
Switch in south east hall on third floor reveal passage to foyer.
When you turn the clock hands to 12 00 the secret door to the third floor opens figure 6.