William the ConquerorALTHOUGH Rouen is now very far before all the other cities of Normandy in point of magnitude and importance, and though Rollo, in his conquest of the country, made it his principal headquarters and his main stronghold, it did not continue exclusively the residence of the dukes of Normandy in after years. The father of William the Conqueror was Robert, who be came subsequently the duke, the sixth in the line. He resided, at the time when William was