Bring the Extended Annals of Darrowshire to Carlin Redpath in Eastern Plaguelands.
The Annals of Darrowshire, through my magic, has gained pages at its end, and now it extends its history beyond the battle. One of the extra passages tells of another Redpath, Carlin, who survived Joseph's betrayal. Carlin's now in the Plaguelands to the east, at the Light's Hope Chapel.
Take the book and speak with him.