...ning about things unknown from visible signs, it rises proportionally as far away as does the Ister. For the Ister flows from the land of the Celts and the city of Pyrene through the very middle of Europe ; now the Celts live beyond the Pillars of Heracles, being neighbors of the Cynesii, who are the westernmost of all the peoples inhabiting Europe. The Ister, then, flows clean across Europe and ends ...