Bolla þáttr Bollasonar (or Bolli Bollason's Tale) is an Icelandic short story (þáttr) that tells an episode of the life of the Viking Bolli Bollason. The work is preserved in the compendium Möðruvallabók (14th century).
According to the story, a man named Þorolfr had a bull that injured other animals from neighboring farms, destroying barns and creating a lot of problems. When an honest local farmer named Þordr saw the bull injure the piles of peat on his farm in Marbaeli, he pounced on the animal with a spear and killed him. In revenge, Þorolfr killed Óláfr, a son of Þord of about seven or eight years, with great displeasure for his mother and relatives. Þorolfr escaped and sought the protection of Þórvaldr Hjaltason (a prominent leader of Hjaltadal). After Christmas, Thorvald got him the custody and support of Guddalir's Starri, who often protected the outlaws.
Þordr's wife, Gudrun, Bolli's first cousin, asked him to take letters on the case. Accompanied by Arnor and a large contingent of men, Bolli attended the Thing de Hegranes. Þorvald and Starri intended to block the matter "by force of arms and numbers," but when they realized that they were inferior, they withdrew and Bolli got Þorolf to be outlawed, who got a ticket to leave Iceland on board a merchant vessel in Hrutafjord. However, Bolli believed that it would have been inappropriate if the outlawed Þorolf had escaped, ridden Hrutafjord, drew his leg-biting sword and pierced him, killing him.
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