The survey also provided the Conquerer with a summary of customs of areas. For instance, in Oxfordshire, "Anyone breaking the King's peace given under his hand and seal to the extent of committing homicide shall be at the King's mercy in respect of his life and members. That is if he be captured. And if he cannot be captured, he shall be considered as an outlaw, and anyone who kills him shall have all his possessions. The king shall take the possessions of any stranger who has elected to live in Oxford and who dies in possession of a house in that town, and without any kinfolk. The king shall be entitled to the body and the possessions of any man who kills another within his own court or house excepting always the dower of his wife, if he has a wife who has received dower. The courts of the king and barons became schools of chivalry wherein seven year old noble boys became as pages or valets, wore a dagger and waited upon the ladies of the household. At age fourteen, they were advanced to squires and admitted into more familiar association with the knights and ladies of the court. They perfected their skills in dancing, riding, fencing, hawking, hunting, jousting, and engaged in team sports in which the goal was to put the other side to rout. They learned the knightly art of war. Enemy fighters were to be taken and held for ransom rather than killed. Those engaging in rebellion were to be pardoned and restored to some or all of their lands and titles. Lords' sons could be mutually exchanged with an enemy's as security for peace. After achieving knighthood, a man usually selected a wife from the court at which he grew up. Parents tried to send their daughters to a household superior in social status not only to learn manners, but to make a good marriage. A girl who did not marry was often sent to a nunnery; a dowry was necessary before her acceptance.