QUOTE : A stylus was a metal-tipped drawing instrument widely used by artists before the invention of the pencil (graphite was not discovered until in 1504, and the wooden-cased graphite pencil appeared only in the second half of the seventeenth century). For drawing with a stylus, artists used paper specially coated with a ground made from, among other things, powdered bone. One fifteenth-century recipe recommended incinerated table scraps, such as chicken wings, whose ground-up ashes were sprinkled thinly on the paper or parchment and then brushed off with a hare’s foot.44 With the paper thus prepared, the artist went to work on its granular surface with his stylus, which was usually made from silver and sharpened to a point, and which, as it was drawn across the surface, left particles behind; these traces quickly oxidized, producing delicate lines of silvery gray.