 Hreiðarr befriends Magnús with his eccentric behaviour but incurs the wrath of Haraldr when he kills one of his courtiers.The story is preserved as a part of "Morkinskinna" and its derivative, "Hulda-Hrokkinskinna", but it may originally have existed as a separate written work.It is believed to be among the oldest stories of its kind, perhaps originally composed around 1200 and certainly no later than the mid-13th century.