in ancient customs, a fee due from vassals to their lord for the sharpening their ploughing tackle. Anciently the tenants in some manors were not allowed to have their rural implements sharpened by any but whom the lord appointed; for which an acknowledgment was to be paid, called agu sadura, in some places agusage: which some take to be the same with what was otherwise called reillage, from the ancient French reille, a ploughshare.