We now come to consider more particularly the cause of this transfer, and the building, fortifying, and garrisoning the Castle of Bridgnorth, in the year A.D. 1102, by Robert de Belesme, the successor of Roger first Earl of Shrewsbury. This nobleman was of a most restless and ambitious spirit, and immediately after the death of William II. entered into a confederacy with other Normans to dethrone Henry I, and to set up his brother Robert Duke of Normandy in his stead, who landed in England in order to further their undertaking. The scheme was defeated by the promptitude and sagacity of the king, who came to an accommodation with his brother, and induced him to return to Normandy; and then he turned his hand against the chief conspirators. After citing Robert de Belesme to appear before him, he publicly proclaimed him an outlaw, and proceeded against him as such; first laying siege to his castle at Arundel in Sussex. Meanwhile Belesme had not been idle, but had set about building and fortifying a castle in Bridgnorth.[11] He considered our hill rising in the midst of the valley of the Severn, and strongly fortified on most sides by natural defences, and commanding the adjacent country, as a fine military position, entrenched within which, he might for a long time, at least till succour was sent him by the confederates, hold out against the royal forces. He therefore engaged in this work with great vigour, and accomplished it with incredible speed. He had indeed no time to lose; but he completed the work in less than a year, before the king could disengage himself from his other enterprises, so as to allow of his following him to Bridgnorth. Florence of Worcester, in his Chronicle, states that he hastened the completion of this work, carrying it on night and day, and that he excited the Welshmen, who were in subjection to him, to the more faithful and speedy performance of his wishes, by awarding to them with a liberal hand, honours, lands, horses, asses, and all sorts of gifts. (_p. 324_, A. D. 1803, _English Translation_.) When we consider the strength of the Castle, and the solidity of its structure, it is quite marvellous that it could have been raised and fortified within so short a space of time. We may judge of the solid character of the building, by the only fragment which now remains of it, which is of the most massive kind of masonry. [11] Appendix B.