Walcher was a priest in
Lotharingia from
Liège and a secular clerk. During the first part of his term as bishop, he was on friendly terms with
Waltheof, Earl of Northumbria, so much so that Waltheof sat with the clergy when Walcher held synods. After Waltheof rebelled and lost his earldom, Walcher was allowed to buy the earldom of Northumbria. Walcher planned to introduce monks into his cathedral chapter, and was remembered as encouraging monasticism in his diocese. Particularly, he was known as the patron of
Aldwine, who attempted to re-establish monasticism at
Whitby. The medieval chronicler
Symeon of Durham stated that Walcher had begun construction of monastic buildings at Durham as part of his plan to introduce monks into Durham. One of Walcher's councillors was
Ligulf of Lumley, who was connected by birth to the old Northumbrian line and was married to the daughter of
Ealdred, Earl of Bernicia. Ligulf's presence in the bishop's council provided a link with the local aristocracy. There was a Scottish invasion in 1079, which Walcher was unable or unwilling to deal with effectively. The Scots, under
Malcolm III, were able to plunder Northumberland for about three weeks unopposed before returning to Scotland with slaves and booty. Ligulf was very critical of Walcher's conduct. A feud ensued between Ligulf and two of Walcher's henchmen, his chaplain Leobwin and his kinsman Gilbert. Gilbert attacked Ligulf's hall in the middle of the night and Ligulf and most of his household were killed. A UNESCO report on
Durham Castle provided this additional information about the bishop: Walcher "purchased the earldom [of Northumbria] and thus became the first of the Prince-Bishops of Durham, a title that was to remain until the 19th century, and was to give Durham a unique status in England. It was under Walcher that many of the Castle's first buildings were constructed. As was typical of Norman castles, it consisted of a motte (mound) and an inner and outer bailey (fenced or walled area). Whether the motte and inner bailey were built first is unknown". ==Character==