As you are about to leave Faal Balabar inform you that he is ready for a phony "rescue" of the Assassin. To find out who hired him.
"I need you to formulate an escape plan which we will go over with the warden tonight at dinner. We shall dine in the northern castle yard. I have arranged plans of the jailhouse complex to be brought to you at your quarters. Good luck, and see you tonight."
With that he gets up and leaves the room.