I have located a third repository of Realaidain treasures, in the mountains south of Stonehold at 58.0 N, 20.8 W. This one was already well-invested with Falatacot minions. I even came face to face with a horrifying Falatacot creature named Vizidh. Before the waves of Sclavus forced me to retreat, I did spy a storeroom that seemed to be full of ornate golden goblets, with a Golem already decommissioned by Falatacot attacks. The Falatacot clearly don't want anyone to be able to follow Asheron's trail. I suppose if there is foul play at work in Asheron's long disappearance, we must consider the Falatacot to be the most likely culprits.
Shan Zhen tells you, "So now, the Portal Servitor seeks a goblet of the House of Realaidain? I think I have a note that would help this search..."
Shan Zhen gives you Western Vault Notes.