"Eric Brighteyes" is a romance founded on the Icelandic Sagas. "What is a saga?" "Is it a fable or a true story?" The answer is not altogether simple. For such sagas as those of Burnt Njal and Grettir the Strong partake both of truth and fiction: historians dispute as to the proportions. This was the manner of the saga's growth: In the early days of the Iceland community-that republic of aristocrats-say, between the dates 900 and 1100 of our era, a quarrel would arise between two great families. As in the case of the Njal Saga, its cause, probably, was the ill doings of some noble woman. This quarrel would lead to manslaughter. Then blood called for blood, and a vendetta was set on foot that ended only with the death by violence of a majority of the actors in the drama and of large numbers of their adherents. In the course of the feud, men of heroic strength and mould would come to the front and perform deeds worthy of the iron age which bore them. Women also would help to fashion the tale, for good or ill, according to their natural gifts and characters. At last the tragedy was covered up by death and time, leaving only a few dinted shields and haunted cairns to tell of those who had played its leading parts.