sentences:  The kingdom was in its final throes, and in 827 when the appearance of Egbert of Wessex and his army at Dore was sufficient to obtain Northumbrian submission, the once-dominant Kingdom of Northumbria disappeared into history.William of Malmesbury says that the bishopric at Candida Casa was depopulated and destroyed by the incursions of Picts and Scots.There is no evidence to suggest any large-scale predations in Galloway at this time, but whether or not that was the case, it is certainly likely that the bishopric simply withered and died along with the other Northumbrian bishoprics.