With the first attempts to introduce Christianity into Sweden (of which more later) a more definite knowledge of Swedish rulers and conditions is gained. When Ansgar, the apostle of Sweden, visited the country for the first time, about 830, the ruling king was _Biœrn_. Shortly afterward King _Anund_ is mentioned. He fled from his land, but was reinstated with the help of the Danes. King _Olof_ was on the throne at the time of Ansgar’s second visit to Sweden, about 850. These kings must have been of the same family as those who held the throne up to the middle of the eleventh century, for their names all occur again in the line of later Swedish kings, the reigns of whom fall in the broad light of history.
We have seen how Ingiald Illrade joined the various communities into one single realm. Although there is doubt whether this realm from the start embraced all Sweden, there is no historical evidence or any reliable traditions whatever to show that Sweden was ever divided into smaller kingdoms after the death of King Ingiald. When Ansgar reaches Sweden he travels through half of the country in order to reach the commercial centre of Birka, where the king of Sweden is dwelling. No other king, great or petty, is spoken of, while the contemporary Icelanders mention jarls (earls) in Gothaland, which proves that the once independent kings in that district were made away with.
Of particular importance is the account of a journey which a certain Wulfstan made to the North, at the close of the ninth century. This account is given in an Old English translation of Orosii Historia, credited to King Alfred of England. Thus it runs: “Wulfstan said that he went from Schleswig to Truso in seven days, that the ship was all the way running under sail. Wendland was on his right, but Langeland, Lolland, Falster and Scania on his left, and all these lands belong to Denmark, and then Bornholm was on our left, which has a king of its own. Then after Bornholm, the lands of Bleking, Mœre, Œland, and Gotland, were first on our left, and these lands belong to Sweden.”
Wulfstan’s account, besides furnishing evidence to prove the political consolidation of Sweden, also gives a good idea of the size of the country in this period. The once independent province of Scania, which had kings of its own, already belongs to Denmark. So does also the province of Halland, while Bohuslæn belongs to Norway. Dal and Vermland are contested provinces between the kings of Sweden and Norway, while great parts of Norrland are yet uninhabited, except by Laps, who ramble from one place to another, without a fixed dwelling place. In King Alfred’s Orosius, Danish Jutland and Swedish Gautland (Gothaland) are alike called _Gotland_, which recalls the supposition of the majority of modern scholars that Gotland was in the earliest times the common Teutonic name of the North, and Goths the common name of its Teutonic inhabitants.