Speak with Georgi Vityazev at the Cape of Good Hope.
This trail leads to the Men-Khatton Necropolis, such an eerie place!
Ermolai was also going to visit Men-Khatton, so if you're going to keep searching for him, that's where you should be heading next. It's not hard to find the Necropolis, you just follow the river going northeast and as soon you start seeing ancient burial mounds then you know you're almost there!
But first you should stop by the northern coast, the Cape of Good Hope. Find Georgi Vityazev, one of the League Defenders - he's a pain in the butt but there's not much else we can offer.
Tell him everything we've managed to learn about Ermolai, this information is very important to the League. Maybe he'll be able to tell you something in return!
You're not from the capital? Is the portal working normally now?
Sigrid... yes, I remember, though I still don't know why people call her Leather Stocking! The last time we saw Ermolai around here was when he was heading for the Cursed Temple with his men. It is an ancient Zem temple behind the Men-Khatton Necropolis, at the eastern edge of the allod.
I said that nothing good would come of it but Ermolai, like all heroes, didn't listen to good advice. And so he went to the temple, and perished there together with all his people.
You say that the Orcs and the waterfolk have fitted themselves in his armor? Well, that's a bad sign!