Henry I. (1100-35) took up, with far-seeing statesman’s eye and much vigour, the work of consolidation. His policy shows an advance upon that of his father. William had contented himself with controlling and curbing the main vices of feudalism, while he played off against it the English native institutions. Henry went further, and introduced within the _Curia Regis_ itself a new class of men representing a new principle of government. The great offices of state, previously held by men of baronial rank, were now filled with creatures of Henry’s own, men of humble birth, whose merit had raised them to his favour, and whose only title to power lay in his goodwill. The employment of this strictly professional class of administrators was one of the chief contributions made by Henry to the growth of the constitution. His other great achievement was the organization of the Exchequer, primarily as a source of royal revenue, but soon found useful as a means of making his will felt in every corner of England. For this great work he was fortunate to secure in Roger, Bishop of Salisbury, the help of a man who combined genius with painstaking ability. At the Exchequer, as organized by the King and his minister, the sheriff of each county twice a year, at Easter and at Michaelmas, rendered account of every payment that had passed through his hands. His balance was adjusted before all the great officers of the King’s household, who subjected his accounts to close scrutiny and criticism. Official records were drawn up, one of which—the famous Pipe Roll of 1130,—is extant at the present day. As the sums received by the sheriff affected every class of society in town and country, these half-yearly audits enabled the King’s advisers to scrutinize the lives and conduct of every one of importance in the land. These half-yearly investigations were rendered more effective by the existence at the Exchequer of a great record of every landed estate in England. With this the sheriffs’ returns could be checked and compared. Henry’s Exchequer thus found one of its most powerful weapons in the great Domesday Survey, the most enduring proof of the statesmanship of the Conqueror, by whose orders and under whose direction it had been compiled.