In 1146, death deprived Matilda of the Earls of Gloucester and Hereford. She retired to Normandy; but her place was taken by the younger Plantagenet, her son. In this year also Stephen availed himself of the presence of the Earls of Chester and Essex at his court to seize their persons, and to force them to render up, the one the castles of Lincoln and Northampton, the other that of Plessy, of which the moated mound and contained church are still seen, and Stansted Montfitchet, now almost merged in a railway station, and which then vied with the old castle of the Bishop of London at Stortford. Walden, also thus gained, is still famous for its earthworks, and for the fragment of its Norman keep, composed, like Bramber and Arques, of flint rubble deprived of its ashlar casing. Earl Geoffrey having thus purchased his liberty, employed it in burning the castle of Cambridge, the mound of which, sadly reduced in size, still, from the interior of the Roman camp, overlooks the river. While in pursuit of the Earl, Stephen is said to have built certain new and probably temporary castles. More probably he refortified with timber some of the moated mounds, such as Clare, Eye, and Bures, of which there are many in Essex and Suffolk. Works in masonry he certainly had neither time nor means then to construct. Soon afterwards the Bishop of Winchester ceased to be papal legate, and found it convenient to support his brother’s party, and persuaded him to refuse permission to Archbishop Theobald to attend the new Pope at Rheims. Theobald, however, defied the King, and on his return took shelter within the unusually lofty walls and strong earthworks of Framlingham, a Bigot castle in Suffolk. About this time mention is made of castles at Cricklade in Wilts, at Tetbury and at Winchcombe in Gloucestershire. At Coventry also there was a castle, and another at Downton in Wiltshire, still celebrated for its moot-hill.