That crafty and unscrupulous king, whose relations with his boy vassal had been one continual game of "fast and loose," as desire dictated or opportunity served, gave a secret chuckle of joy as Duke William and his slender escort of knights and men-at-arms rode into the palace yard at Poissy, only a few miles north-west of modern Versailles. And when at last he saw the youth an actual suppliant at his throne his thought was: "Ah ha! Duke William and Normandy are in my power at last." But King Henry's lips seldom spoke his thoughts. "Cousin of Normandy," he said, "you have done well and wisely to pray my aid against your rebel barons and this wicked boy of Burgundy. To whom else should you turn but to the overlord to whom your great father, Duke Robert, confided you as a sacred trust years ago?" The lad might justly have inquired how King Henry had kept the trust his father had confided in him. But he only said: "'T is not for me but for my father's duchy that I plead. The very life of Normandy is in jeopardy, my liege." "And right valiantly will we relieve it, lad," the king exclaimed. "Send out your rallying-call. Summon your loyal vassals. Join force and arm with me, and the banners of France and Normandy shall wave above conquered rebels and a victorious field." Action quickly succeeded words. An army was speedily raised. The loyal Normans of the eastern counties hurried to the standard of their young lord, and at the head of a combined French and Norman force, king and duke, in the summer of the year 1047, confronted the rebel knights under Guy of Burgundy, Grimbald de Plessis, Neel of St. Savior, and Randolf of Bayeux, on the open slopes of Val-es-dunes, or the valley of the sand-hills, not far from the town of Caen, and almost within sight of the English Channel. Duke William led the left wing and King Henry the right. There was a shouting of battle-cries--the _Dix aie_ of the loyal Normans and the _Montjoye-St. Denys_ of France mingling with _St. Savior_ and _St. Armand_ from the rebel ranks. Then, as in a great tournament, horse and rider, shield, sword, and lance closed in desperate combat. It was a battle of the knights. King Henry went down twice beneath the thrust of Norman lances, but was on his horse again fighting valiantly in his vassal's cause, and Duke William, in this his first pitched battle, by a day of mingled courage, good fortune, prowess, and personal success, laid the basis of that wonderful career that filled his daring and victorious future, and fitted him to bear the proud though bloody title of the Conqueror. Hand to hand, not with lance but with sword, he vanquished in open conflict the champion of the rebel knights, Hardrez of Bayeux, and ere darkness fell his enemies were vanquished and in desperate flight for life, and his power as Duke of Normandy was established finally and forever.