Gruk
"I will tell you what you wish to know, then direct you as best I can. This seems a fair bargain for a defeated foe. You ask about the Mongrel. I do not know his name, but he was dressed as a soilder. He was with a group who came recently. The rest stayed above, he came below alone. He knew where he was going. I met him in a different place, near the underground river. There we surrounded him. In exchange for this band of gold, I let him pass unmolested. He crawled along the wall up the river. It is a dangerous place, & we did not follow. He emerged & climbed back up his rope. He was not a human as you, but of orc blood. Soon, more orcs came to the area above. Thus provoked, the King had them destroyed. I was not involved in that operation, though."