The great engineering works at Bridgenorth seem to have occupied the mind of Earl Robert during the whole of the few remaining years of his English career. We shall find that they were not fully finished four years later. At the same time, while he fenced in Bridgenorth in the rear of the capital of his earldom, he raised another stronghold in advance of it, within the later Welsh border, at Careghova, immediately on Offa’s Dyke.[417] And he was at the same time extending his possessions in a more peaceful region, where no inroads of Britons or Northmen were to be feared. On the borders of Yorkshire and Nottinghamshire stood a chief seat of one who, in the extent of his possessions, ranked as one of the foremost men in England. This was Roger of Bully, who took his name from a Norman lordship in the land of Braye, lying west of what was to be the New Castle of King Henry, on the high ground which overlooks the forest of Saint-Saen, the home of the faithful Helias. The name of Roger of Bully――the spellings of the name are endless――is less commonly mentioned in our tale than we might have looked for. He was a great land-owner in Yorkshire; he was one of the greatest land-owners in Nottinghamshire, and he held considerable estates in other parts of England. He had supplanted two English earls in their special homes; he sat by the hearth of Eadwine and by the hearth of Waltheof; in another spot, the holdings of ten English thegns had been rolled together into a single lordship to enrich the fortunate stranger.[418] Among his Yorkshire estates he held the exceptionally favoured lands of Sprotburgh and Barnburgh, which had remained untouched in the general harrying of Northumberland.[419] He seems to have won the special favour of the greatest ladies of the Conqueror’s court; if he held the hall of Hallam, the hall of Waltheof, it was by the gift of Waltheof’s widow Judith;[420] and an estate which he held in distant Devonshire is set down as the gift of Queen Matilda herself.[421] Yet this man, who holds so great a place in the Survey, plays no visible part in history; he lives only in the record of Domesday and in his still abiding work in a minster and a castle of his own rearing. Just within the borders of Yorkshire, at no great distance from the shires both of Nottingham and Lincoln, Roger had occupied an English dwelling-place, entered in the Survey as Dadesley, but which afterwards grew into greater note by the name of Tickhill.[422] Like many other dwelling-places of English lords, Dadesley or Tickhill must have been chosen simply as a convenient centre for the estates of its owner. It is no natural stronghold; the post seems to have no special military advantages; it crowns no steep, it commands no river, it bars the entrance to no valley. A low hill of sandstone was improved by art into one of the usual mounds, and it had been in King Eadward’s day the possession of Ælfsige and Siward. The mound, as in other places,