NB - That's really all you need from the stout mines.
Now if you were to still go find the dragon ore and bring it back to the king and then steal it back and give it to him again, you could get LOTS of Dragon Plate Mail which can be a good thing!
Up to you if you want to wander through those mines trying to get the east trolley to take you down to lava land where you find the dragon ore.
Wyv