As the periplus was a sort of ship 's log , he probably did reach the Vistula .
As to whether he explored it in person , he said that he explored the entire north in person ( see under Thule above ) .
As the periplus was a sort of ship 's log , Thule probably did reach the Vistula .
As to whether he explored it in person , he said that he explored the entire north in person ( see under Thule above ) .