The story of _Beowulf_, which in the fight with Grendel has analogies with the plainer kind of goblin story, rather alters its tone in the fight with Grendel's mother. There are parallels in _Grettis Saga_, and elsewhere, to encounters like this, with a hag or ogress under water; stories of this sort have been found no less credible than stories of haunting warlocks like Grendel. But this second story is not told in the same way as the first. It has more of the fashion and temper of mythical fable or romance, and less of matter of fact. More particularly, the old sword, the sword of light, in the possession of Grendel's dam in her house under the water, makes one think of other legends of mysterious swords, like that of Helgi, and the "glaives of light" that are in the keeping of divers "gyre carlines" in the _West Highland Tales_. Further, the whole scheme is a common one in popular stories, especially in Celtic stories of giants; after the giant is killed his mother comes to avenge him. Nevertheless, the controlling power in the story of _Beowulf_ is not that of any kind of romance or fantastic invention; neither the original fantasy of popular stories nor the literary embellishments of romantic schools of poetry. There are things in _Beowulf_ that may be compared to things in the fairy tales; and, again, there are passages of high value for their use of the motive of pure awe and mystery. But the poem is made what it is by the power with which the characters are kept in right relation to their circumstances. The hero is not lost or carried away in his adventures. The introduction, the arrival in Heorot, and the conclusion, the return of Beowulf to his own country, are quite unlike the manner of pure romance; and these are the parts of the work by which it is most accurately to be judged. The adventure of Grendel is put in its right proportion when it is related by Beowulf to Hygelac. The repetition of the story, in a shorter form, and in the mouth of the hero himself, gives strength and body to a theme that was in danger of appearing trivial and fantastic. The popular story-teller has done his work when he has told the adventures of the giant-killer; the epic poet has failed, if he has done no more than this. The character and personage of Beowulf must be brought out and impressed on the audience; it is the poet's hero that they are bound to admire. He appeals to them, not directly, but with unmistakable force and emphasis, to say that they have beheld ("as may unworthiness define") the nature of the hero, and to give him their praises.