Swap any two tiles to complete the pictures.
See screenshot for solution (U).
Open the suitcase.
Examine the suitcase and read the four notes.
Place the DEAD POWER CUBE in the charger and turn the handle; take the CHARGED POWER CUBE (V).
Back out and enter Inks Room.
Examine Matthew and place the CHARGED POWER CUBE on him (W).
Take Matthew (X). He will now be added to your toolbar and you can use him to reach items out of your reach.
Use Matthew to get the MECHANICAL LOCK PICK (Y).
Jump out the window to Main Street.
Use Matthew on the jacket (Z).
Return to Inks Room.
Use Matthew on the Myriapod (A).
Zoom into the hole in the wall; take the MILITARY JACKET (B).
Go to the gate.