User blog comment:IamJakuhoRaikoben/Chapter 439: Albareth Empire, Review./@comment-4933386-20150608135303/@comment-7418318-20150608135855

Maybe it used to be more widely known, but then Mest or more likely a predecessor in the guild, deleted that knowledge all over Fiore. But the people over on the other continent were beyond this person's reach and thus they still remember. Or they were resistant against the memory manipulation.