The "Heimskringla" of Snorri Sturlason is a collection of sagas concerning the various rulers of Norway, from about A.D. 850 to the year A.D. 1177....

There goes a great mountain barrier from north-east to south- west, which divides the Greater Swithiod from other kingdoms. South of this mountain ridge it is not far to Turkland, where Odin had great possessions. In those times the Roman chiefs went wide around in the world, subduing to themselves all people; and on this account many chiefs fled from their domains.

But Odin having foreknowledge, and magic-sight, knew that his posterity would come to settle and dwell in the northern half of the world. He therefore set his brothers Ve and Vilje over Asgaard; and he himself, with all the gods and a great many other people, wandered out, first westward to Gardarike, and then south to Saxland. He had many sons; and after having subdued an extensive kingdom in Saxland, he set his sons to rule the country. He himself went northwards to the sea, and took up his abode in an island which is called Odins in Fyen.

Then he sent Gefion across the sound to the north to discover new countries; and she came to King Gylve, who gave her a ploughgate of land. Then she went to Jotunheim, and bore four sons to a giant, and transformed them into a yoke of oxen. She yoked them to a plough, and broke out the land into the ocean right opposite to Odins.

This land was called Sealand, and there she afterwards settled and dwelt. Skjold, a son of Odin, married her, and they dwelt at Leidre. Where the ploughed land was is a lake or sea called Laage. In the Swedish land the fjords of Laage correspond to the nesses in Sealand.

Brage the Old sings thus of it: —

"Gefion from Gylve drove away,

To add new land to Denmark's sway —

Blythe Gefion ploughing in the smoke

That steamed up from her oxen-yoke:

Four heads, eight forehead stars had they,

Bright gleaming, as she ploughed away;

Dragging new lands from the deep main

To join them to the sweet isle's plain.

Now when Odin heard that things were in a prosperous condition in the land to the east beside Gylve; he went thither, and Gylve made a peace with him, for Gylve thought he had no strength to oppose the people of Asaland. Odin and Gylve had many tricks and enchantments against each other; but the Asaland people had always the superiority. Odin took up his residence at the Maelare lake, at the place now called Old Sigtun.

There he erected a large temple, where there were sacrifices according to the customs of the Asaland people. He appropriated to himself the whole of that district, and called it Sigtun. To the temple priests he gave also domains. Njord dwelt in Noatun, Frey in Upsal, Heimdal in the Himinbergs, Thor in Thrudvang, Balder in Breidablik; to all of them he gave good estates.