Go south to the hallway door.
Thief 2 masks third floor door can t open.
Sneak down the hall past the guard turn the corner and go right into the foyer.
First floor south cross the hall and pick the lock on the security room door.
Secret 3 switch on control panel in the northeast opens door to the nearby hallway and vice versa.
After grabbing everything head back to the lobby.
When you turn the clock hands to 12 00 the secret door to the third floor opens figure 6.
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.
This opens a passage back to the hallway.
Kill the cameras and cross the hall to the ballroom.
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.
The 2nd room has 3 masks worth 50 in goods and the third room has 2 masks worth 50 in goods as well as another precursor mask.
Switch in south east hall on third floor reveal passage to foyer.
Look near the bottom figure 1.
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.
Secret not counted switch on desk in north study on third floor reveals.