Hálfdanar saga Brönufóstra to his father's kingdom and defeats and kills Soti and his Vikings. Although numerous sagas contain analogs to the iconic cave battle with Grendel and his mother in "Beowulf," none is closer to the Old English epic than is Hálfdan’s cave battle with Járnnefr and his wife. The saga is found in three, 15th-century vellum manuscripts, but its post-medieval popularity is evidenced by its preservation in over four dozen paper manuscripts. In the 18th century it served as the source for the first known saga forgery. "Hálfdanar saga Brönufóstra" has a sequel in "Sörla saga sterka", where it becomes clear
The dragon (Beowulf) 1935 work "Beowulf and the Seventh Century", Ritchie Girvan writes that "Beowulf" should be seen as having some degree of historical accuracy despite the presence of a dragon in it; he argues that "Tales of dragons as well as a belief in dragons survived till recent times, and the popular mind is apt to accept with credulity stories of water-monsters. The stories, moreover, are often attached to real persons and localized precisely in time and place. The habit is so well known that examples are superfluous". Raymond Wilson Chambers, in his "Beowulf: An Introduction to the Study of the Poem