But the affairs of the North attracted little attention while the civil war was at its height in the South. In 1139 Stephen had wrought himself fatal damage by quarrelling with the ecclesiastical bureaucrats, the kinsmen and allies of Roger of Salisbury, who had been among his earliest adherents. Jealous of their power and their arrogance, and doubting their loyalty, he imprisoned them and confiscated their lands. This threw the whole church party on to the side of Matilda; even Henry, bishop of Winchester, the king's own brother, disowned him and passed over to the other side. Moreover, the whole machinery of local government in the realm fell out of gear, when the experienced ministers who were wont to control it were removed from power. Matilda had landed in England in the winter of 1139-1140; for a year her partisans made steady progress against the king, and on the 2nd of February 1141 Stephen was defeated and taken prisoner at the battle of Lincoln. All England, save the county of Kent and a few isolated castles elsewhere, submitted to Matilda. She was hailed as a sovereign by a great assembly at Winchester, over which Stephen's own brother Bishop Henry presided (April 7, 1141) and entered London in triumph in June. It is doubtful whether she would have obtained complete possession of the realm if she had played her cards well, for there were too many powerful personages who were interested in the perpetuation of the civil war. But she certainly did her best to ruin her own chances by showing an unwise arrogance, and a determination to resume at once all the powers that her father had possessed. When she annulled all the royal acts of the last six years, declared charters forfeited and lands confiscated, and began to raise heavy and arbitrary taxes, she made the partisans of Stephen desperate, and estranged many of her own supporters. A sudden rising of the citizens drove her out of London, while she was making preparations for her coronation. The party of the imprisoned king rallied under the wise guidance of his wife Matilda of Boulogne and his brother Henry, and many other of the late deserters adhered to it. Their army drove the lately triumphant party out of Winchester, and captured its military chief, Robert, earl of Gloucester. So much was his loss felt that his sister exchanged him a few months later for King Stephen.