Among the earliest conquests of the Norse vikings was a portion of the present Sleswick which after them was called Nortmannia. It is possible that they recognized the sovereignty of the kings of Denmark, though there is no direct evidence that they regarded themselves as vassals. The first intelligence we obtain concerning them is that their king Sigfrid, in the year 777, received hospitably the Saxon chieftain Widukind, who, when summoned to meet Charlemagne in Paderborn, fled northward and sought refuge with his Norse co-religionists. This Sigfrid belonged to the renowned race of the Ynglings, from whom descended Harold the Fairhaired, and through him a long line of Norwegian kings. A later king of Nortmannia, who also had great possessions in Norway, was Gudröd or Godfrey the Hunter. He came, through the friendship of the Saxons, repeatedly into collision with Charlemagne, and even threatened to attack the emperor in Aachen. It is told that he was killed by his own men in the year 809. He had about a year before attacked and slain the king of Agder, whose daughter Aasa he married. She bore him a son named Halfdan the Swarthy, but avenged her father's death by inducing her servant to kill her husband while he was drunk. One of Godfrey's sons, Erik, carried on an intermittent warfare with Charlemagne's son, Louis the Pious, sent embassies to Aachen, and in 845, during the reign of Louis the German, sacked and burned the city of Hamburg. St. Ansgarius, the apostle of the North, who had been established by the emperor as archbishop of Hamburg, fled with all his priests; and the church and the monastery which he had founded were utterly destroyed. It was not only in his remote northern domains that Charlemagne came in contact with the vikings. The chronicles of the Monks of St. Gall relate that he also encountered them in his Mediterranean provinces. Once, as he was visiting a city in Gallia Narbonensis, some fast-sailing Norse ships with square sails were seen out in the harbor. Soon a message was brought to the emperor that the crews had landed and were plundering the shore. Nobody then knew to what nationality these ships belonged, some conjecturing that they were Jewish, others African, and again others that they were British merchant vessels. "No," said Charlemagne, "these ships are not filled with merchandise, but with the most pugnacious foes." Hearing this everybody seized his weapons and hastened to the harbor; but the vikings had in the meanwhile learned that the emperor was in the city, and as they were not strong enough to fight with him, they fled to sea. [Illustration: ST. ANSGARIUS, THE APOSTLE OF THE NORTH.] It is related that Charlemagne, as he stood at his window and watched their flight, wept. Remarking the wonder of his men, he said: