Original sentence: 'Adeiladwyd gan dlodi, — nid cerrig., are obscure, although it is identified on maps as being an old mill.The land (Foel fawr) on which it stands is owned by the National Trust.The origins of the tower, which is popularly known to English residents as the "Jampot"
Edited sentence: Adeiladwyd gan dlodi, — nid cerrig.The land (Foel Fawr) on which it stands is owned by the National Trust.The origins of the tower, which is popularly known to English residents as the "Jampot", are obscure, although it is identified on maps as being an old mill