Durin is pleased to have gained access to Gundabad, but he knows the dwarves must fortify their position inside the mountain if they are to keep it.
'Ah, I see the warning in your eye, my friend. Let me ease your worries: I know there is much yet to do, and Gundabad is not yet fully-reclaimed. But we have made a start, and is that not sometimes the most difficult of a journey's steps?
'I set Glóin to observe the northern approach to Maergrind. Find him and see what he thinks of our defensive position here... and if it be lacking, help him to improve it until the old warrior is satisfied!'
Glóin is north of Maergrind, the Noble Gate, in Máttugard, down one level.
Durin put Glóin in charge of scouting the mighty court, and asked you to aid him with his task.
Glóin asked you to defeat several different enemies lurking within Máttugard, and to search for relics from the Sixth War of Dwarves and Orcs, when last the dwarves occupied Gundabad.
Glóin is north of Maergrind in Máttugard.