The question whether Saxo Grammaticus' account of Biarco's fight with a
bear or the account in the _Hrólfssaga_ of Bjarki's fight with a winged
monster is the earlier version of the story has been the subject of much
discussion, as has also the possible identity of Bjarki's (Biarco's)
exploit with one or both of Beowulf's exploits (his slaying of Grendel
and the dragon).