Just as she was completing her eighth year, Matilda was sent over to Germany to learn the language and the ways of her new country. A stately embassy and a rich dower went with her, for which her father had provided by taking the regular feudal aid to marry the lord's eldest daughter, at the rate of three shillings per hide throughout England. On April 10, 1110, she was formally betrothed to the emperor-elect at Utrecht. On July 25, she was crowned Queen of Germany at Mainz. Then she was committed to the care of the Archbishop of Trier, who was to superintend her education. On January 7,1114, just before Matilda had completed her twelfth year, the marriage was celebrated at Mainz, in the presence of a great assembly. All things had been going well with Henry. In Germany and in Italy he had overcome the princes and nobles who had ventured to oppose him. The clergy of Germany seemed united on his side in the still unsettled investiture conflict with the papacy. The brilliant assembly of princes of the empire and foreign ambassadors which gathered in the city for this marriage was in celebration as well of the triumph of the emperor. On this great occasion, and in spite of her youth, Matilda bore herself as a queen, and impressed those who saw her as worthy of the position, highest in rank in the world, to which she had been called. To the end of her stay in Germany she retained the respect and she won the hearts of her German subjects. By August, 1111, King Henry's stay in England was over, and he crossed again to Normandy. What circumstances called him to the continent we do not know, but probably events growing out of a renewal of war with Louis VI, which seems to have been first begun early in 1109.[22] However this may be, he soon found himself in open conflict all along his southern border with the king of France and the Count of Anjou, with Robert of Bellême and other barons of the border to aid them. Possibly Henry feared a movement in Normandy itself in favour of young William Clito, or learned of some expression of a wish not infrequent among the Norman barons in times a little later, that he might succeed to his father's place. At any rate, at this time, Henry ordered Robert of Beauchamp to seize the boy in the castle of Elias of Saint-Saens, to whom he had committed him five years before. The attempt failed. William was hastily carried off to France by friendly hands, in the absence of his guardian. Elias joined him soon after, shared his long exile, and suffered confiscation of his fief in consequence. It would not be strange if Henry was occasionally troubled, in that age of early but full-grown chivalry, by the sympathy of the Norman barons with the wanderings and friendless poverty of their rightful lord; but Henry was too strong and too severe in his punishment of any treason for sympathy ever to pass into action on any scale likely to assist the exiled prince, unless in combination with some strong enemy