Use the GROWTH FORMULA in the well (C).
Go to the 2nd Floor.
Use the NIPPERS on the door wire and take the SLIDE 2/5 (D).
Turn the handle (E).
Enter the library.
Take the MASK (F).
Examine the desk to trigger a HOP.
Play the HOP.
After you get the code (6) you need to close all the drawers and then open the A, G and E drawers.
You receive the SCROLL KEY (G).