All the PCs can post their own sense motive checks to make their own assessments of Inspector Giovianne's intentions...
If there are no further questions the guardsman leads you all many bridges further into the district to the Artifice Nexus. It is well into the afternoon now, you all are hungry, the guardsman does not notice of course. The tower is beautifully decorated on the outside with arcane symbols and small gargoyles. The guardsman takes you right up to the door and enters, there is a chime (magical not mechanical) as it opens. Inside is a lavishly appointed shop, the shelves and display cases are lined with books, scrolls, and potions mostly, but you see other items of various sorts scattered about.
At a table is a tall male-personality warforged in fine robes, he stands as you enter. "May I help you?" he asks in a hollow voice.
"These individuals have information for Councilman Thellick, it is official Watch business, can you summon him please?" responds the guardsman.
"Certianly, anything for the Watch" replies the Warforged. He moves to the center of the room where there is a disk on the floor, with a command it levitates up through a hole in the ceiling carrying him to the second level. This seems to be the only way to the second level. In a few moments he returns.
"The Council is in session at present, Councilman Thellick has been notified that you are waiting and will arrive as soon as possible. In the mean time I will have a meal brought for you, please make yourselves comfortable up on the second level."