the first time you speak with arghur (after getting the quest from capt. jarthur), he will not give you his standard speech. instead, you will get more history on delgarath and an entreaty to explore the last known battlefield of the lost dwarven king.
you exit this speech thread and re-greet arghur to receive the next quest in the line - exploring an old but still dangerous battlefield.
this quest is known as 'search the barrows' and we will talk about it at a later day!!!