That's true, [ Calla says with a quick nod, Anakin's incredulity flying clear over his head. ] So we can assume the solution isn't below us...

[ Calla's eyes sweep over the walls around the cage, looking for any clues. The glum scenery is a far cry from anything he was familiar with in the Gardens, but his object recognition isn't so poor that he can't tell what they are. Books, desks, tapestries, candles... ] It is quite interesting that they set this scene in this particular room. Maybe it's meant to be a clue?