A freeman could further himself by becoming the client of one or more lords. The lord made his client a grant of property (i.e. livestock or land) and, in return, the client owed his lord yearly payments of food and fixed amounts of work. The clientship agreement could last until the lord's death. If the client died, his heirs would carry on the agreement. This system of clientship enabled social mobility as a client could increase his wealth until he could afford clients of his own, thus becoming a lord. Clientship was also practised between nobles, which established hierarchies of homage and political support.