The ancient author Pausanias wrote that the river issues from the inner side of the embankment surrounding the city of Caphyae near lake Orchomenus, after which it descends into a chasm of the earth, issuing again at a place called Nasi (); and that the name of the village where it issues is named Rheunus ().
The ancient author Pausanias stated that the river emerges from the inner side of the embankment surrounding the city of Caphyae near lake Orchomenus, then descends into a chasm in the earth and reappears at a place called Nasi (); and the name of the village where it appears is Rheunus ().