monetary rent

It was tied with the decrease in monetary rent, replaced by physical labor, demands for which increased over time.

In time, and with the development of currency, most of those services evolved into payment of monetary rent, which became the dominant form of service around the 14th-15th centuries.

The rest ceased to exist as feudal baronies by tenure, becoming baronies in free socage, that is to say under a "free" (hereditable) contract requiring payment of monetary rents.

Tenure by knight-service was abolished and discharged and the lands covered by such tenures, including once-feudal baronies, were henceforth held by socage (i.e. in exchange for monetary rents).

Despite the ruined nature of the castle, the local estates previously subject to the castle-guard system continued to return their dues, now converted into monetary rents, to the owners of Eye Castle for many years.

Land sales are rare, worse, the lawyers are in control and there are three general levels of vested interest: The tenants, have certain rights and obligations over and above monetary rent while leases are generally for the lesser of three generations or 99 years.