Doom of the Griffiths

Among other traditions preserved relative to this part of the Welsh hero’s character, is the old family prophecy which gives title to this tale.  When Sir David Gam, “as black a traitor as if he had been born in Builth,” sought to murder Owen at Machynlleth, there was one with him whose name Glendwr little dreamed of having associated with his enemies.  Rhys ap Gryfydd, his “old familiar friend,” his relation, his more than brother, had consented unto his blood. 

Sir David Gam might be forgiven, but one whom he had loved, and who had betrayed him, could never be forgiven.  Glendwr was too deeply read in the human heart to kill him.  No, he let him live on, the loathing and scorn of his compatriots, and the victim of bitter remorse.  The mark of Cain was upon him.