In 841 the black boats of the sea-rovers for the first time entered the Seine, and burnt Rouen and Fontenelle. In 845 a fleet of one hundred and twenty vessels swept up its higher waters and on Easter Eve captured, plundered and burnt Paris, sacked its monasteries and churches and butchered their monks and priests. The futile Emperor Charles the Bald bought them off at St. Denis with seven thousand livres of silver, and they went back to their Scandinavian homes gorged with plunder--only to return year by year, increased in numbers and ferocity. Words cannot picture the terror of the citizens and monks when the dread squadrons, with the monstrous dragons carved on their prows, their great sails and threefold serried ranks of men-of-prey, were sighted. Everyone left his home and sought refuge in flight; the monks hurried off with the bodies of the saints, the relics and treasures of the sanctuary, to hide them in far-away cities. In 852 Charles' soldiers refused to fight, and for two hundred and eighty-seven days the pirates ravaged the valley of the Seine at their will. Never within memory or tradition were such things known. Rouen, Bayeux, Beauvais, Paris, Meaux, Melun, Chartres, Evreux, were devastated; the islands of the Seine were whitened by the bones of the victims, and similar horrors were wrought along the other rivers of France. In 858 a body of the freebooters settled on the island of Oissel, below Rouen, and issued forth _en excursion_ to spoil and slay and burn at their pleasure: the once rich city of Paris was left a cinder heap; the abbey of St. Genevieve was sacked and burnt, Notre Dame, St. Stephen, St. Germain des Pres and St Denis alone escaping at the cost of immense bribes. Charles ordered two fortresses to be built for the defence of the approaches to the bridges, and continued his feeble policy of paying blackmail. In 865 St. Denis was pillaged. In 866 Robert the Strong, Count of Paris, had won the title of the Maccabeus of France, by daring to stand against the fury of the Northmen and to defeat them; but having in the heat of battle with the terrible Hastings taken off his cuirass, he was killed. By order of Charles, St. Denis was fortified in 869, after another pillage of St. Germain. In 876 began a second period of raids of even greater ferocity under the Norwegian Rollo the Gangr[32] (the walker), a colossus so huge that no horse could be found to bear him. In 884 the whole Christian people seemed doomed to perish. Flourishing cities and monasteries became heaps of smoking ruins; along the roads lay the bodies of priests and laymen, noble and peasant, freeman and serf, women and children and babes at the breast to be devoured of wolves and vultures. The very sanctuaries[33] were become the dens of wild beasts, the haunt of serpents and creeping things. [Footnote 32: The remains of the great Viking's castle are still shown at Aalesund, in Norway.]