After the Conquest and their territorial establishment, the bonds which united the Norman aristocracy were necessarily drawn still closer together. Encamped in the midst of a people who regarded them with hostility and were capable of vigorous resistance, the conquerors felt the need of unity; so they linked themselves together, and fortified the central power. On the Continent, after the Barbarian invasions, we hear of hardly any insurrections of the original inhabitants: the wars and conflicts are between the conquerors themselves; but in England they are between the conquerors and the conquered people. We indeed meet, from time to time, with revolts of the Norman barons against the king; but these two powers generally acted in concert, for their interest was their bond of union. {286} Moreover, William had found a royal domain of large extent, already in existence: and it received immense increase from confiscations of the lands of Anglo-Saxon rebels. Although the spoliation was not universal, it was carried out with unexampled promptitude and regularity. William soon had 600 direct vassals, nearly all of whom were Normans, and his landed property was divided into 60,215 knight's fees, a large quantity of which frequently belonged to the same master; for example, Robert de Mortaigne alone possessed 973 manors, the Earl of Warrenne 278, and Roger Bigod 123; but they were all scattered through different counties, for though the prudent William was willing to make his vassals rich, he was not desirous of making them too powerful. Cohesion Of The Norman Aristocracy. Another proof of the cohesion of the Norman aristocracy is supplied by the Doomsday Book; a statistical account of the royal fiefs, and register of the demesne lands and direct vassals of the king, which was begun in 1081 and terminated in 1086: it was compiled by royal commissioners. King Alfred had also directed the compilation of a similar register, but it has been lost. Nothing of the kind was ever done in any other country.