During the whole period from the coming of the Normans in 1066 to the signing of Magna Carta in 1215 there can be brought forward only two or three instances of assent by the National Council to taxes levied by the king, and these few instances are at best equivocal. They are insufficient to justify the belief that the National Council had any final power over the levying of taxation. But the period is not altogether gray; it concludes with the enunciation in Magna Carta of rights which cast a halo of color over the whole subsequent narrative of the struggle for parliamentary taxation. [William the Conqueror 1066-1087] William the Conqueror was precisely the man most likely to exercise supreme control over taxation. Elected to the kingship according to the Saxon forms and with his title to the crown backed up by force of arms, he created a system of government of which he himself was the center and in which his authority, even to the vassals of vassals, was supreme.[14] With his thirst for power thus satisfied he was given a free hand to indulge his besetting sin of avarice. Small wonder was it therefore that he clung to the revenues of his predecessors and added new imposts of his own. [His National Council] Nevertheless, notwithstanding the absolutist character of the king, William retained the theory and for the most part the form of the Saxon Witan. Never, however, did the Norman assemblies exercise independent legislative or executive functions.[15] The holding of land, as a prerequisite to membership in the National Council, was under William an uncertain factor; the membership continued to include, generally speaking, the same officers, ecclesiastics, and nobles as composed the Witenagemot. The powers of this assembly were probably not great; at any rate, the magnates of the period considered attendance not as a right or a privilege or even as an advantage, but merely as a necessary duty toward the royal person. The king consulted the magnates on almost every piece of legislation, and stated in the subsequent promulgation of the laws that he had obtained their advice. But in the case of a strong king, such as was the Conqueror, the consultation must have been scarcely more than a statement of the royal will and a formal acquiescence. The holding of these assemblies took place at the crowning days of the king, at Christmas, Easter, and Whitsuntide, generally in London, Winchester, and Gloucester. [Its part in taxation] [Instance of the Danegeld, 1084]