The goblin-deserters roaming the Dourstocks indicated that something their leaders were up to in Burgûl-stazg was the cause of their desertion.
'${PLAYER}, we must learn the root cause of the goblins' fear. Something is taking place at Burgûl-stazg, and it must be stopped, but first we must learn exactly what it is.
'You should go to Burgûl-stazg and see if you can find anything out, but be careful not to be seen by the guards. Detection of your presence may make your quest more difficult. Look for goblins that are especially nervous.
'Return to me when you have learned more.'
Burgûl-stazg lies to the north-west of Echad Mothelen.
Mothelen has asked you gather information from nervous goblins at Burgûl-stazg; however, he also warned you to avoid being seen by the guards of the goblin-camp.
Mothelen is at Echad Mothelen, south-east from Burgûl-stazg.
You should bring the deserter's note to Mothelen with what you have learned.