Henry I himself was married to David's older sister, Edith, a union which closely bound him to the Scottish royal house. For as long as Henry I lived, relations between him and David remained harmonious. When the former died in 1135, however, the peace between the neighbouring realms was shattered when his nephew, Stephen of Blois, Count of Boulogne and Mortain, successfully seized the throne. Before the end of the year, the Scots surged forth and seized Carlisle and Cumberland before peace was restored. Relations broke down the following year, and the Scots again invaded in 1137, seizing Northumberland, and pushed forth towards York. The contemporary accounts of the English chroniclers Richard Hexham and Ailred, Abbot of Rievaulx single out Gallovidian soldiers for their excessive atrocities in David's campaign. Disaster struck the Scots in 1138 at the Battle of the Standard, when David's forces were utterly overcome by the English near Northallerton.