Deliver Balthule's letter to Delgren the Purifier in Ashenvale Forest.
My master, Delgren the Purifier, is a paladin who has graciously offered his assistance in defending our forests from the forces of the demons and undead. He has taught me much about the Holy Light and the art of battle.
Delgren must know of the cult's operations immediately.
You will find him far south of here at Maestra's Post in Ashenvale Forest. Be swift, I fear the Dark Strand's threat grows with each passing hour.