This is the mission where you have to help the Vizier defend against attacks from the famle crusader (don't remember her name). The last quests I received and completed were to give the log book to Ibn something on the Wisdom island, and to give 8t of leather to the Vizier. I have not received any new quests for over 2 hours of gameplay, though there are plenty of quests still available (according to what I've found on the web). Has anyone run into this and found a workaround, or am I screwed and need to start over?