"Well it is a castle, there could be hidden passageways that not even the owner would necessarily know about. Likely the 'device' we're looking for is in one of those, unless the owner did have something to do with it then it very well could still be in a hidden passageway or just in a room that isn't used for public appearances.  For now I suggest we check the lord's bedroom as there may be a map of the building either there or in his study."  She hopped down from the window and began heading towards what should be the main hall.