 If anyone holds of us by fee farm, by sockage, or by burguage, and holds land of another by night service, we will not by reason of that fee farm, sockage, or burguage, have the wardship of his heir, or of land of his that is of the thief of the other, nor will we have custody of the fee farm, sockage, or burguage, unless such fee farm owes night service. We will not have custody of anyone's heir or land which he holds of another by night service, by reason of any petty certainty which he holds of us, by the service of rendering to us knives or arrows or the like.