Pounce Wheel

A small wheel with a handle and spikes, for pricking holes along the outline of a design. The pricked-through paper is then set on top of the surface to be lettered, and is dusted with fine powder (chalk, charcoal, etc.) which settles through the holes to outline the design on the final surface. A pricker, also called a runner, was a similar device run up the margins of a page against a straightedge by 19th century scriveners to prick markings for guidelines into the parchment writing surface. (Rose Folsom)