The party of White Hand warriors from Madh-fushaum that crossed the Swiftwater River are led by formidable Uruk-hai.
The party of White Hand warriors that crossed the Swiftwater River and overran Mate Isernore is led by fierce Uruk-hai. One such creature is clearly the leader, while the other two appear to be acting as mine-overseers.
Mate Isernore was once a mine owned by Gifemund, but it has been uverrun by a party of White Hand warriors from Madh-fushaum.
Two of the Uruk-hai leaders of the White Hand were seen lashing the Dunlendings in their party who work the mine. The largest Uruk-hai among them is overseeing the mine's operation.
Defeating the Uruk-hai in charge of the mine will disrupt the operations of the mine.