Reliefs are ancient. Glanvil. Rel., 9. Reliefs are by tenure and by custom. 3 E., 3, 13, per Hern. Reliefs reserved on grants are not properly reliefs, but services. 31 Ass., 12. In Wales there is a custom to pay 10s. for a mortuary and 10s. for alienation by relief and distress, when the land is worth £ 40.