When William had penetrated as far as Abernethy in the county of Fife[162] he was met by the army of his adversary; but as neither king was really anxious to proceed to extremities, before long they mutually agreed to the following arrangement. Malcolm received a grant of certain manors in England, with the promise of a yearly payment of twelve marks of gold, performing the usual homage in return for the grant of English fiefs, and giving up Duncan, his son by his former marriage, as a hostage for the fulfilment of his obligations.[163] The Conqueror then retraced his steps to the south. His predominance in the north at length established, Cospatric could be safely taxed, both with his alleged connivance in the death of Robert Comyn, and with his actual presence at the storm of the castles of York. Neither of these charges had interfered with his advancement to the earldom of Northumberland when it had been the aim of William to detach a formidable opponent from the ranks of his enemies; nor did his innocence of the first crime avail him now, and his fief was given to Waltheof, whose feats at York upon the same occasion, where he long defended the gate with his single arm, cutting down the Normans one after another as they entered, were for the present either pardoned or overlooked. Cospatric escaped by a timely flight, and after a brief residence in Flanders, rejoined his countrymen in Scotland, where he received from Malcolm, who seems to have forgotten his former resentment against the Earl, the important fortress of Dunbar with an ample portion of the surrounding territory, and he became the ancestor of the noble family of Dunbar, long prominent amongst the barons of southern Scotland as Earls of Lothian or the March.[164] [Sidenote: A. D. 1073.] Not long after the treaty of Abernethy, Edgar returned from the continent to Scotland, where, though he was received with every mark of honour and respect by his sister and her husband, Malcolm earnestly pressed upon him the advantage of accepting the castle of Montreuil, offered by the king of France for the purpose of establishing a troublesome neighbour in the vicinity of the Norman possessions of their mutual foe. Edgar accordingly once more left Scotland laden with the costly presents of his relatives, but like most men of his character the Atheling was doomed to misfortune, and ere long Scotland again received him, a shipwrecked and homeless wanderer. It was no part of the policy of Malcolm to risk the vengeance of the Conqueror in fruitless attempts at assisting his feeble brother-in-law, and he now strongly advised him to tender his submission to the English king. It was accepted most willingly; and with much empty ceremony and parade, Edgar was conducted to the English frontier, and from thence to Normandy, where he resigned his pretensions to the English crown, and passed the remainder of his life, for the most part, in indolent and peaceful insignificance.[165]