Thuggee can access extra areas of the game by waving at Thuggee Access Statues. By doing this extra doors, ropes or climbing bars will appear letting you access other areas of the level which may have Artifact parts, Purple Studs or Parcels. Go to the library and buy a few Thuggees and you may be able to find things you are missing, and be the envy of your friends.
Thuggee Access Statues appear in every level, so they can be a great help.
In the Free the Slaves, go to where the mine cart crashed and look to your right to find one. Use it. Guess what it does: it explodes into an artifact piece! Wow!