Obtain the Twilight Slaver's Key and free 6 Enslaved Miners.
According to the orders you found, there is a key inside the tent in the southeastern end of Deathwing's Fall.
Obtain it and free the slaves in the quarry to the south.
You can choose one of these awards:
Also, you get: 8 20
Let us find this journal. We're getting close to the World Pillar fragment, I can sense it.
Upon completion of this quest you will gain: