"written in Chaldean or Greek letters"

   The 'Chaldean' dialect of Old Aramaic was named for and used by the Chaldean Dynasty, which ruled Babylon during the 6th century BC.  The name would later become synonymous with arcane knowledge and astronomy.

Download linguist Boudewijn Rempt's recreation of Chaldean as a digital font, based on John Mandeville's writings