The feudal system on the Continent permitted a powerful
noble to gather his vassals and make war on the king, whenever he chose to do
so. William had been familiar with this evil side of feudalism, both in France
and in his own duchy of Normandy, and he determined to prevent its introduction
into England. William established the principle that a vassal owed his first
duty to the king and not to his immediate lord. If a noble rebelled and his men
followed him, they were to be treated as traitors. Rebellion proved to be an
especially difficult matter in England, since the estates which a great lord
possessed were not all in any one place but were scattered about the kingdom. A
noble who planned to revolt could be put down before he was able to collect his
retainers from the most distant parts of the country.
DOMESDAY BOOK, 1085 A.D.
The extent of William's authority is illustrated by the
survey which he caused to have made of the taxable property of the kingdom.
Royal commissioners went throughout the length and breadth of England to find
out how much farm land there was in every county, how many landowners there
were, and what each man possessed, to the last ox or cow or pig. The reports
were set down in the famous Domesday Book, perhaps so called because one could
no more appeal from it than from the Last Judgment. A similar census of
population and property had never before been taken in the Middle Ages.
THE SALISBURY OATH, 1086 A.D.
Almost at the close of his reign William is said to have
summoned all the landowning men in England to a great meeting on Salisbury
Plain. They assembled there to the number, as it is reported, of sixty thousand
and promised "that they would be faithful to him against all other
men." The Salisbury Oath was a national act of homage and allegiance to the
king.