Rider
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
A schedule or small piece of paper or parchment added to some part of the record; as, when on the reading of a bill in the legislature a new clause is added, this is tacked to the bill on a separate piece of paper, and is called a "rider." RIDER (or RIDDER) ROLL. In old Engrecord. Cowell; Blount. A supplementary roll.
2 Tidd, Prac. 730.