Reveal What Is Written on the Other Side of the Blackboard | Explosion in Beckett's Residence The Testament of Sherlock Holmes Guide
Last update: 11 May 2016
Now approach a blackboard and see that the lesson is about Greece. Try to rotate a board by clicking on a screw. They are stuck.
Return to kitchen and pick up a olive oil left of the stove.
Use it on both screws (left and right one) and rotate a board (click on it).
Look at it: there is a Greek alphabet. Watson will copy it.