Stóthkell is satisfied with the work you have done to help prepare the Heart of Fire for war, and wants you to do the same for the dwarves at the Twenty-first Hall.
'The Heart of Fire is now ready for war, ${PLAYER}. We have begun making high-quality equipment for the defenders and strong barricades to help our position, and we owe much to your great assistance.
'But we absolutely cannot lose the Twenty-first Hall. You must return to Brogur in the Chamber of Leadership and render him equal assistance.
'The Orcs will surely be caught off guard by our excellent defences! I'd wager they are confident that we will be caught unawares.'
Brogur is in the Chamber of Leadership off the Twenty-first Hall in Zelem-melek.
You have helped the dwarves in the Heart of Fire to prepare the defence, and Stóthkell wants you to do the same for the dwarves of the Twenty-first Hall.