"an agreement for tythes"
People giving their Tithe to the Clergy
Public DomainPeople giving their Tithe to the Clergy

The tythes (now written tithes) were a tax taken by the Church, usually one tenth of money earned or produce grown.

A clergyman had a share of that money to spend according to certain rules. Some of it was meant to be used to help the less fortunate and to maintain the church.