Mean time the Earl of Anjou, who was not in a condition to assert his wife's title to England, hearing Stephen was employed at home, entered Normandy with small force, and found it no difficult matter to seize several towns. The Normans, in the present distraction of affairs, not well knowing what prince to obey, at last sent an invitation to Theobald Earl of Blois, King Stephen's eldest brother, to accept their dukedom upon the condition of protecting them from the present insults of the Earl of Anjou. But before this matter could come to an issue, Stephen, who, upon reduction of the towns already mentioned, had found a short interval of quiet from his English subjects, arrived with unexpected speed into Normandy; where Geoffrey of Anjou soon fled before him, and the whole duchy came over to his obedience; for the further settlement whereof he made peace with the King of France; constituted his son Eustace Duke of Normandy; and made him swear fealty to that Prince, and do him homage. His brother Theobald, who began to expostulate upon this disappointment, he pacified with a pension of two thousand marks:[28] and even the Earl of Anjou himself, who, in right of his wife, made demands of Stephen for the kingdom of England, finding he was no equal match at present, was persuaded to become his pensioner for five thousand more.[29] [Footnote 28: The mark of Normandy is to be understood here. Such a pension in that age was equivalent to one of £31,000 sterling in the present. [D.S.]] [Footnote 29: Five thousand marks of silver coin was, in this reign, of the same value as the sum of £77,500 modern currency, is now. Here again the Norman mark seems to be used. [D.S.]] Stephen, upon his return to England, met with an account of new troubles from the north; for the King of Scots, under pretence of observing his oath of fealty to the Empress, infested the Borders, and frequently making cruel inroads, plundered and laid waste all before him. 1138.