 David may have been intending to enlarge his control of northern England when he fought at the Battle of the Standard, some of the soldiers of David's force being Cumbrians (from south of the Solway-Esk line, that is).Despite losing the battle, David kept his Cumbrian lands, and his son Henry was made Earl of Northumberland at the (second) Treaty of Durham (1139).This arrangement lasted another twenty years, during which David minted his own coins using the silver from the Alston mines, founded the abbey at Holm Cultram, kept the north largely out of the civil war of Stephen and Matilda, and, by the "Carlisle settlement" of 1149, obtained a promise from Henry of Anjou that, upon the latter's becoming King of England, he would not challenge the King of Scots's rule over Carlisle and Cumberland.