After picking up a package from the Cooky, a letter is left at the counter.

Seeker Scae

I wish to glance upon the mithril chain, perhaps to buy the piece. Contact me of how we shall meet, or I will find you at the Hall.

M'lanthar, The Last Stand Inn

Come by the Seeker Hall. The piece is made out of svirfneblin mithril, from a raided slave caravan led by goblins.

Seeker Scae