On your way to the mine, a man calls out of the barn. "Hey, you heading to the Mine? Would'ja kill some kobolds for ol' Jimb while you're at it? You'll find a good load of 'em there."
Kill some kobolds on your way to the back of the mine. Refuse Jimb's request. Ask Jimb why he wants you to kill kobolds. Ignore Jimb and focus on your mission. Tell Jimb you'll do it to get him off your back. Don't bother doing it, though. You'll probably never see him again, so it won't matter.