Beowulf the king of the Danes, whose mead hall in Heorot has been under attack by a monster known as Grendel. After Beowulf slays him, Grendel's mother attacks the hall and is then also defeated. Victorious, Beowulf goes home to Geatland (Götaland in modern Sweden) and later becomes king of the Geats. After a period of fifty years has passed, Beowulf defeats a dragon, but is mortally wounded in the battle. After his death, his attendants cremate his body and erect a tower on a headland in his memory. The full story survives in the manuscript known as the Nowell Codex.
Beowulf was made early on by Guðbrandur Vigfússon (1878). "Grettis saga" is a family saga, and a story about , a great-grandson of an Icelandic settler, cannot be comparably as old as "Beowulf". Axel Olrik (1903) claimed that on the contrary, this saga was a reworking of "Beowulf", and others had followed suit. However, (1910) wrote a thesis in which both "Beowulf" and "Grettis saga" drew from a common folkloric source, and this encouraged even a detractor such W. W. Lawrence to reposition his view, and entertain the possibility that certain elements in the saga (such as the waterfall in place