"I have a guess as to how they got here. Have you heard of the Beast-Paths?"
You frown. "The trails in the deep woods that Warherds travel along?"
"In part. And what of the Worldroots?"
Your frown deepens. "I don't believe so. Unless it refers to leylines."
"They might be connected to them in some way. It's a network of underground passages that once connected all the lands of the world, but in modern times many of its branches are sickened or dead, and the Beastmen burrow into the dead Worldroots like woodworms. In this way the Beast-Paths allow Beastherds to reach many parts of the world unseen and unsuspected. It may be how they have reached this place, far from the defiled woods that they usually haunt, and how their population has survived however many years of combat with the Kurgan."
You resist the urge to sigh as the list of things you intend to look up when you return to civilization grows ever longer. In your defence, who would have predicted that you should have read up on Beastmen before travelling to the steppes? "Thank you. I'll investigate the possibility when I have access to the libraries of Altdorf once more. Is this a mystery of Taal or Rhya I should keep to myself?"
He shakes his head. "A curiosity known to those that dedicate themselves to pursuing the Cloven Ones."