A few years before Fulk’s investiture as count of Anjou, the relations between the West-Frankish kingdom and its northern foes had entered upon a new phase. In 912 King Charles the Simple and Duke Hugh of Paris, finding themselves unable to wrest back from a pirate leader called Hrolf the Ganger the lands which he had won around the mouth of the Seine, made a virtue of necessity, and by a treaty concluded at St.-Clair-sur-Epte granted to Hrolf a formal investiture of his conquest, on condition of homage to the king and conversion to the Christian faith. Tradition told how a rough Danish soldier, bidden to perform the homage in Hrolf’s stead, kissed indeed the foot of Charles the Simple, but upset him and his throne in doing so; and although to the declining Karolingian monarchy the new power thus established at the mouth of the Seine was useful as a counterpoise to that of the Parisian dukes, yet the story is not altogether an inapt parable of the relations between the duchy of Normandy and its royal overlord during several generations. The homage and the conversion of Hrolf and his comrades were alike little more than nominal. His son, William Longsword, strove hard to force upon his people the manners, the tongue, the outward civilization of their French neighbours; but to those neighbours even he was still only a “leader of the pirates.” The plundering, burning, slaughtering raids did indeed become less frequent and less horrible under him than they had been in his father’s heathen days; but they were far from having ceased. Politically indeed it was William’s support alone that enabled Charles the Simple to carry on to his life’s end a fairly successful struggle with a rival claimant of his crown, Rudolf of Burgundy, a brother-in-law of Hugh, duke of the French. No sooner was Charles dead and Rudolf seated on his throne than the hostility of the northmen to the new king broke out afresh in a pirate-raid which swept across the Norman border, past Orléans and through the Gâtinais, into the very heart of the kingdom, to the abbey of S. Benedict at Fleury on the Loire. It was not the first time the monastery had been ravaged by pirates; the abbot was now evidently expecting their attack, for he had called to his aid Count Gilbald of Auxerre and Ingelger of Anjou, Fulk’s eldest son, who, young as he was, had already made himself a name in battle with the northmen. The fight was a stubborn one; the defenders of Fleury had resolved to maintain it to their last gasp, and when at length all was over there was scarcely a man of them left to tell the tale. The young heir of Anjou, taken prisoner by the pirates, was slaughtered beneath the shadow of S. Benet’s abbey as Count Robert the Brave had been slaughtered long ago at the bridge of Sarthe.[246] Fortunately, however, the future of the Angevin house did not depend solely on the life thus cut off in its promise. Two sons yet remained to Fulk. The duty of stepping