The Conquerer was a stern and fierce man and ruled as an autocrat by terror. Whenever the people revolted or resisted his mandates, he seized their lands or destroyed the crops and laid waste the countryside and so that they starved to death. His rule was strong, resolute, wise, and wary because he had learned to command himself as well as other men. He was not arbitrary or oppressive. The Conquerer had a strict system of policing the nation. Instead of the Anglo-Saxon self-government throughout the districts and hundreds of resident authorities in local courts, he aimed at substituting for it the absolute rule of the barons under military rule so favorable to the centralizing power of the Crown. He used secret police and spies and the terrorism this system involved. This especially curbed the minor barons and preserved the public peace. The English people, who outnumbered the Normans by 300 to 1, were disarmed. Curfew bells were rung at 7:00 PM when everyone had to remain in their own dwellings on pain of death and all fires and candles were to be put out. This prevented any nightly gatherings, assassinations, or seditions. Order was brought to the kingdom so that no man dare kill another, no matter how great the injury he had received. The Conquerer extended the King's peace on the highways, i.e. roads on high ground, to include the whole nation. Any individual of any rank could travel from end to end of the land unharmed. Before, prudent travelers would travel only in groups of twenty. The barons subjugated the English who were on their newly acquired land. There began a hierarchy of seisin [rightful occupation] of land so that there could be no land without its lord. Also, every lord had a superior lord with the king as the overlord or supreme landlord. One piece of land may be held by several tenures. For instance, A, holding by barons' service of the King, may enfeoff B, a church, to hold of him on the terms of praying for the souls of his ancestors, and B may enfeoff a freeman C to hold of the church by giving it a certain percentage of his crops every year. There were about 200 barons who held land directly of the King. Other fighting men were the knights, who were tenants or subtenants of a baron. Knighthood began as a reward for valor on the field of battle by the king or a noble. The value of a knight's fee was 400s. [20 pounds] per year. Altogether there were about 5000 fighting men holding land.