The treaty was ratified at Winchester in the first days of August;[27] and thus, almost on the anniversary of the Red King’s death, ended the last Norman invasion of England. But the treaty of Winchester, like that of Caen, failed to settle the real difficulty. That difficulty was, how to control the barons. According to one version of the treaty, it was stipulated that those who had incurred forfeiture in England by their adherence to Robert and those who had done the same in Normandy in Henry’s behalf should alike go unpunished;[28] according to another, perhaps a more probable account, the brothers agreed to co-operate in punishing traitors on both sides.[29] Henry set to work to do his part methodically. One after another, at different times, in various ways, by regular process of law, the offenders were brought to justice in England: some heavily fined, some deprived of their honours and exiled. It was treason not so much against himself as against the peace and order of the realm that Henry was bent upon avenging; Ivo of Grantmesnil was fined to the verge of ruin for the crime of making war not upon the king in behalf of the duke, but upon his own neighbours for his own personal gratification--a crime which was part of the daily life of every baron in Normandy, but which had never been seen in England before,[30] and never was seen there again as long as King Henry lived. The most formidable of all the troublers of the land was Henry’s old enemy at Domfront--Robert, lord of Bellême in the border-land of Perche, earl of Shrewsbury and Arundel in England, count of Alençon and lord of Montgomery in Normandy, and now by his marriage count of Ponthieu. Robert was actually fortifying his castles of Bridgenorth and Arundel in preparation for open revolt when he was summoned to take his trial on forty-five charges of treason against the king of England and the duke of Normandy. As he failed to answer, Henry led his troops to the siege of Bridgenorth. In three weeks it surrendered; Shrewsbury and Arundel did the same, and Robert of Bellême was glad to purchase safety for life and limb at the cost of all his English possessions.[31] [27] Sim. Durh. _Gesta Reg._ a. 1101. [28] Eng. Chron. a. 1101. [29] Ord. Vit. (Duchesne, _Hist. Norm. Scriptt._), p. 788. [30] _Ib._ p. 805. [31] _Ib._ pp. 807, 808. Eng. Chron. a. 1102.