Berwick upon Tweed and its castle were captured by the English in 1482 during the Anglo-Scottish Wars. By the Treaty of Fotheringhay, 11 June 1482, Alexander Stewart, Duke of Albany, the brother of James III of Scotland declared himself King of Scotland and swore loyalty to Edward IV of England. The follow-up invasion of Scotland failed to install Albany on the throne, but the border town of Berwick upon Tweed has remained English ever since the castle surrendered on 24 August 1482. The English army left Edinburgh with a promise for the repayment of the dowry paid for the marriage Princess Cecily of England to the Scottish Prince.