Dan y D?r

Disgrifiad Saesneg / English Description: When Detective Jeff Evans is called to investigate an attack on an old friend, he discovers that someone has been poisoning the local river. Is this the result of poaching or something more sinister? Disgrifiad Cymraeg / Welsh Description: Pan gaiff y Ditectif Jeff Evans ei alw i ymchwilio i ymosodiad ar hen gyfaill, mae'n darganfod bod rhywun yn gwenwyno'r afon leol. Ai potsiwrs sy'n gyfrifol, ynteu oes rhywbeth mwy sinistr ar droed? Cyhoeddwr / Publisher: Gwasg Carreg Gwalch Categori / Category: Nofelau a Storïau ar Gyfer Oedolion (C) Awdur / Author: John Alwyn Griffiths