It is unfinished, we are only told that Hadfling got back.

Why he was taken to this under-world?
Who took him?
What followed therefrom?
Saxo does not tell.

It is left to us to make out.
That it is an archaic story of the kind in the Thomas of Ercildoune and so many more fairy-tales, e.g., Kate Crack-a-Nuts, is certain.

The "River of Blades" and "The Fighting Warriors" are known from the Eddic Poems.

The angelica is like the green birk of that superb fragment, the ballad of the Wife of Usher's Well--a little more frankly heathen, of course-- "It fell about the Martinmas, when nights are long and mirk, The carline wife's three sons cam hame, and their hats were o' the birk.
It neither grew in syke nor dyke, nor yet in ony sheugh, But at the gates o' Paradise that birk grew fair eneuch." The mantel is that of Woden when he bears the hero over seas; the cock is a bird of sorcery the world over; the black fowl is the proper gift to the Underground powers--a heriot really, for did not the Culture god steal all the useful beasts out of the underground world for men's use?
Dr.Rydberg has shown that the "Seven Sleepers" story is an old Northern myth, alluded to here in its early pre-Christian form, and that with this is mixed other incidents from voyages of Swipdag, the Teutonic Odusseus.
"Thorkill's Second Voyage to Outgarth-Loke to get Knowledge" .-- (a) Guthrum is troubled as to the immortality and fate of the soul, and the reward of piety after death.