Stump or stomp
A kind of pencil consisting of a tight roll of paper or soft leather, or of a cylindrical piece of rubber or other soft material used for rubbing down hard lines in pencil or crayon drawing, for blending the lines of shading so as to produce a uniform tint. A stump may be used with any powdery pigment such as graphite or charcoal, spreading and rubbing it. The use of stumps was in greatest favor in the eighteenth and nineteenth centuries. Although commercially available today, the use of stumps has largely gone out of favor in the last century. Also called a torchon or tortillon.