• It's on the fourth floor, near the entrance to the house.
• It's important that you get here before too much happens.

• start at the refectory
• WEST to staircase
• UP
• UP
• UP
• SOUTH to a corridor with a spiral painted on the wall.
• The lab is locked; you'll need to find the key.

Because the BAG and the VIAL of anti-plague medicine are here. This is also the only place in which you can safely build the key to time.