When Harman sees the Vorgrimler inspecting the ancient dwarven weapons he waits until Beauregard leaves before seeking Vorgrimler alone. I must warn against the ancient weapons I fear them cursed I found one and took it as my own for a time. I was visit by a dwarven lord ghost. If you speak their language perhaps you'll fare better than I did with reasoning with the spirits. I tried warning Sol's men but it only angered Beauregard.