A knowledge (local - Rashemen) check would maybe have a chance to have heard about it, but only because it relates to something that occurred at the Althing just over a year back. It's still obscure enough that the DC would be quite high. Really, it's like trying to use bardic knowledge to know the first-level adventures of a party from five years ago. But, I guess that's how all the rumors around town start...
Just harder here because people knew of the Nydeshka fleeing, but I don't think the party who followed him was known to the general public, and by the time they caught up to him, the Althing was over, so it's not like there are people sitting around in town wondering and gossiping about what became of those adventurers who went up to the goblin hills last week. The people left and went back home. The party never returned to speak to the townsfolk of their grand adventure, etc.
All that to say, you don't know of it, except what you overhear.