Besides receiving this sum, the Danes were engaged by another motive to depart a kingdom which appeared so little in a situation to resist their efforts. They were invited over by their countrymen in Normandy, who at this time were hard pressed by the arms of Robert, king of France, and who found it difficult to defend the settlement, which, with so much advantage to themselves, and glory to their nation, they had made in that country. It is probable, also, that Ethelred, observing the close connections thus maintained among all the Danes, however divided in government or situation, was desirous of forming an alliance with that formidable people. For this purpose, being now a widower, he made his addresses to Emma, sister to Richard II., duke of Normandy, and he soon succeeded in his negotiation. The princess came over this year {1001.} to England, and was married to Ethelred.[*] [* H, Hunting, p. 359. Higden, p. 271.] In the end of the ninth and beginning of the tenth century--when the north, not yet exhausted by that multitude of people, or rather nations, which she had successively emitted, sent forth a new race, not of conquerors, as before, but of pirates and ravagers, who infested the countries possessed by her once warlike sons--lived Rollo, a petty prince or chieftain in Denmark, whose valor and abilities soon en gaged, the attention of his countrymen. He was exposed in his youth to the jealousy of the king of Denmark, who attacked his small but independent principality, and who, being foiled in every assault, had recourse at last to perfidy for effecting his purpose, which he had often attempted in vain by force of arms.[**] [** Dudo, ex edit. Duchesne, p. 70, 71. Gul. Gemeticenia, lib. ii, cap. 2, 3.]