{ 1091.} The continued intestine discord among the barons was alone in that age destructive; the public wars were commonly short and feeble, produced little bloodshed, and were attended with no memorable event. To this Norman war, which was so soon concluded, there succeeded hostilities with Scotland, which were not of longer duration. Robert here Commanded his brother’s army, and obliged Malcolm to accept of peace, and do homage to the crown of England. This peace was not more durable. { 1093.} Malcolm, two years after, levying an army, invaded England; and after ravaging, Northumberland, he laid siege to Alnwick, where, a party of Earl Moubray’s troops falling upon him by surprise, a sharp action ensued in which Malcolm was slain. This incident interrupted for some years the regular succession to the Scottish crown, Though Malcolm left legitimate sons, his brother Donald, on account of the youth of these princes, was advanced to the throne; but kept not long possession of it. Duncan, natural son of Malcolm, formed a conspiracy against him; and being assisted by William with a small force, made himself master of the kingdom. New broils ensued with Normandy. The frank, open, remiss temper of Robert was ill fitted to withstand the interested, rapacious character of William, who, supported by greater power, was still encroaching on his brother’s possessions, and instigating his turbulent barons to rebellion against him. The king, having gone over to Normandy to support his partisans, ordered an army of twenty thousand men to be levied in England, and to be conducted to the sea-coast, as if they were instantly to be embarked. { 1094.} Here Ralph Flambard, the king’s minister, and the chief instrument of his extortions, exacted ten shillings apiece from them, in lieu of their service, and then dismissed them into their several counties. This money was so skilfully employed by William that it rendered him better service than he could have expected from the army. He engaged the French king by new presents to depart from the protection of Robert; and he daily bribed the Norman barons to desert his service; but was prevented from pushing his advantages by an incursion of the Welsh, which obliged him to return to England, tie found no difficulty in repelling the enemy; but was not able to make any considerable impression on a country guarded by its mountainous situation. A conspiracy of his own barons which was detected at this time, appeared a more serious concern, and engrossed all his attention. { 1095.} Robert Moubray, earl of Northumberland, was at the head of this combination; and he engaged in it the count d’Eu, Richard de Tunbridge, Roger de Lacy, and many others. The purpose of the conspirators was to dethrone the king, and to advance in his stead Stephen, count of Aumale, nephew to the Conqueror. William’s despatch prevented the design from taking effect, and disconcerted the conspirators. Moubray made some resistance; but being taken prisoner, was attainted and thrown into confinement, where he died about thirty years after. { 1096.} The count d’Eu denied his concurrence in the plot, and to justify himself, fought, in the presence of the court at Windsor, a duel with Geoffrey Bainard, who accused him. But being worsted in the combat, he was condemned to be castrated, and to have his eyes put out. William de Alderi, another conspirator, was supposed to be treated with more rigor when he was sentenced to be hanged.