Im trying to figure out how to complete the last part of this quest curing the plagued and I went back to see Archmage Rufan the guy who gives the quest to you and all he says when you click on him is I'm a bit busy sorry or I can't help you right now.
if this helps it says on the lower left of the screen where it shows you the currant quest your on.
[7-46] complete curing the plagued quest book