Short answers, pulled from the story.
Västgötalagen is the oldest Swedish text written in Latin script and the oldest of all Swedish provincial laws. It was compiled in the early thirteenth century and served as the legal code for Västergötland, Dalsland, and Mo härad.
The law was compiled in the early thirteenth century. The earliest complete text is dated 1281, while small fragments of an older text have been dated to 1250.
Eskil Magnusson is believed to have been at least partly responsible for the compilation of Västgötalagen in the early thirteenth century. The source describes the law as having been compiled probably at least partly at his instigation.
Västgötalagen declared that no one could inherit property while staying in "Greece," the Scandinavian term for the Byzantine Empire, in order to stop the emigration of Swedish men enlisting in the Varangian Guard.
Laurentius was a priest in Vedum who added material to the oldest manuscript of Äldre Västgötalagen around 1325. He included notes on the Sweden-Denmark border, lists of bishops in Skara, lists of lawspeakers in Västergötland, and a list of Swedish kings from Olof Skötkonung to Johan Sverkersson.
The two versions are Äldre Västgötalagen (the Elder Westrogothic law) and Yngre Västgötalagen (the Younger Westrogothic law). A first modern printing of the text was published by Carl Johan Schlyter in 1827, which made it the subject of the earliest known stemma.