Count it a dream -- a fantasy- a parable. In the hands of a T.H. White it might have turned into a Once And Future King. With Poul Anderson as mentor, it becomes something of a reverse side of the science fiction shield with more than a cloak of mystery. But it can scarcely be sold to either market. For here is a legend -- a tale of reincarnation, as Ogler le Danois reappears, and fights the forces of Chaos in a world in which the forces of Law are besieged. And then, again a mere man, he brackets his story as Holger Carlsen, Dane, recounts what might have been a dream to the author.