Þáttr_Ólafs_Geirstaða_Alfs
"Þáttr Ólafs Geirstaða Alfs" is a þáttr , a short anecdotal story, about the semi-legendary Norse king Olaf Geirstad-Alf. It is preserved in Flateyjarbók, a saga collection that was written at the end of the 14th century. Olaf Geirstad Alf, who is also one of the kings who appear in the poem Ynglingatal, is said to have been king of Vestfold or Grenland in Norway in the late 9th century.