 First, a real composition is when an agreement is made between the owner of the lands, and the parson or vicar, with the consent of the ordinary and the patron, that such lands shall for the future be discharged from payment of tithes, by reason of some land or other real recompence given to the parson, in lieu and satisfaction thereof.Secondly, a discharge by custom or prescription, is where time out of mind such persons or such lands have been, either partially or totally, discharged from the payment of tithes.And this immemorial usage is binding upon all parties, as it is in its nature an evidence of universal consent and acquiescence; and with reason supposes a real composition to have been formerly made.