There are two major sources for the story of Vinland. One is known as the Greenlanders’ saga. There are two versions of the other, Erik the Red’s saga: Hauk’s book and Skalholt book. They are nearly identical, but certain significant details differ. Hauk’s book was largely written between 1306 and 1308, mostly by the Icelandic law speaker Hauk Erlendsson. The Skalholt book is named after the episcopal seat Skalholt, where the book was preserved. There are considerable differences between the two sagas. The Greenlanders’ saga describes the accidental sighting of Vinland by Bjarni Herjolfsson and five subsequent expeditions, the first led by Leif Eriksson and the others by members of his family. Erik the Red’s saga tells the same story but with all the expeditions combined into one major expedition led by Thorfinn Karlsefni and his wife, Gudrid. In this version, Leif has been pushed into the role of accidental discoverer, storm- driven to an unknown land. The Icelandic historian Ólafur Halldórsson has shown that Thorfinn and Gudrid were given greater prominence to enhance the fame of one of their late twelfth- century descendants.