sentences:  And there remains the possibility that he was not strictly monogamous, and the existence of two wives need not be mutually exclusive.The dominant theme of the sagas about Harald's numerous sons is the struggle for the Norwegian throne, in particular the way it manifests itself in the careers of Haakon and his foil Eric.According to "Heimskringla", Harald had appointed his sons as client kings over the various districts of the kingdom, and intended Eric, his favourite son, to inherit the throne after his death.