[MN 1106. Conquest of Normandy.] Next year he opened the campaign with the siege of Tenchebray; and it became evident, from his preparations and progress, that he intended to usurp the entire possession of Normandy. Robert was at last roused from his lethargy; and being supported by the Earl of Mortaigne and Robert de Bellesme, the king's inveterate enemies, he raised a considerable army, and approached his brother's camp, with a view of finishing, in one decisive battle, the quarrel between them. He was now entered on that scene of action in which alone he was qualified to excel; and he so animated his troops by his example, that they threw the English into disorder, and had nearly obtained the victory [t]; when the flight of Bellesme spread a panic among the Normans, and occasioned their total defeat. Henry, besides doing great execution on the enemy, made near ten thousand prisoners, among whom was Duke Robert himself, and all the most considerable barons who adhered to his interests [u]. This victory was followed by the final reduction of Normandy: Rouen immediately submitted to the conqueror: Falaise, after some negotiation, opened its gates; and by this acquisition, besides rendering himself master of an important fortress, he got into his hands Prince William, the only son of Robert: he assembled the states of Normandy; and having received the homage of all the vassals of the duchy, having settled the government, revoked his brother's donations, and dismantled the castles lately built, he returned into England, and carried along with him the duke as prisoner. That unfortunate prince was detained in custody during the remainder of his life, which was no less than twenty-eight years, and he died in the castle of Cardiff, in Glamorganshire, happy if, without losing his liberty, he could have relinquished that power which he was not qualified either to hold or exercise. Prince William was committed to the care of Helie de St. Saen, who had married Robert's natural daughter, and who, being a man of probity and honour beyond what was usual in those ages, executed the trust with great affection and fidelity. Edgar Atheling, who had followed Robert in the expedition to Jerusalem, and who had lived with him ever since in Normandy, was another illustrious prisoner taken in the battle of Tenchebray [w]. Henry gave him his liberty, and settled a small pension on him, with which he retired; and he lived to a good old age in England, totally neglected and forgotten. This prince was distinguished by personal bravery: but nothing can be a stronger proof of his mean talents in every other respect, than that, notwithstanding he possessed the affections of the English, and enjoyed the only legal title to the throne, he was allowed, during the reigns of so many violent and jealous usurpers, to live unmolested, and go to his grave in peace. [FN [t] H. Hunt. p. 379. M. Paris, p .43. Brompton, p. 1002. [u] Eadmer, p. 90. Chron. Sax. p. 214.