They later move on to Gwales ( often identified with Grassholm Island off Dyfed ) where they live for eighty years without perceiving the passing of time .
The survivors stay in Harlech , where they are entertained by Bendigeidfran 's head , which continues to speak .
survivors later move on to Gwales ( often identified with Grassholm Island off Dyfed ) where survivors live for eighty years without perceiving the passing of time .
The survivors stay in Harlech , where they are entertained by Bendigeidfran 's head , which continues to speak .