This revengeful act of the peasantry was followed by a treacherous deed of the emperor, which brought renewed trouble upon the land. Eager to rid himself of his powerful and troublesome vassal in Friesland, Charles invited Gottfried to a meeting, at which he had the Norsemen treacherously murdered, while his brother-in-law Hugo was deprived of his sight. It was an act sure to bring a bloody reprisal. No sooner had news of it reached the Scandinavian north than a fire of revengeful rage swept through the land, and from every port a throng of oared galleys put to sea, bent upon bloody retribution. Soon in immense hordes they fell upon the imperial realm, forcing their way in mighty hosts up the Rhine, the Maese, and the Seine, and washing out the memory of Gottfried's murder in torrents of blood, while the brand spread ruin far and wide. The chief attack was made on Paris, which the Norsemen invested and besieged for a year and a half. The march upon Paris was made by sea and land, the marauders making Rouen their place of rendezvous. From this centre of operations Rollo--the future conqueror and Duke of Normandy, now a formidable sea-king--led an overland force towards the French capital, and on his way was met by an envoy from the emperor, no less a personage than the Count of Chartres, the once redoubtable Hasting, now a noble of the empire. "Valiant sirs," he said to Rollo and his chiefs, "who are you that come hither, and why have you come?" "We are Danes," answered Rollo, proudly; "all of us equals, no man the lord of any other, but lords of all besides. We are come to punish these people and take their lands. And you, by what name are you called?" "Have you not heard of a certain Hasting," was the reply, "a sea-king who left your land with a multitude of ships, and turned into a desert a great part of this fair land of France?" "We have heard of him," said Rollo, curtly. "He began well and ended badly." "Will you submit to King Charles?" asked the envoy, deeming it wise, perhaps, to change the subject. "We will submit to no one, king or chieftain. All that we gain by the sword we are masters and lords of. This you may tell to the king who has sent you. The lords of the sea know no masters on land."