Requires you to complete Sir Miles, Servant of the Flame (II). Miles’ duty has brought him to Northreach, where he has heard rumors of a sword belonging to his father being in the town. The NPC with his sword is near the northwestern exit and you’ll need either Therion of Tressa to get it. Unfortunately, the Memorial Sword seems to have a fairly low chance to Steal it, so it’s easier to just Purchase it instead. Return to Miles after obtaining the sword to finish the quest.