Shadowgraphy (or Ombromanie) is the art of using hands to form figures onto a screen using shadows. Its origins go back to 850 AD in Indonesia and (618-907) in China during the Tang Dynasty. It was made popular by Félicien Trewey (1848-1920), a French entertainer who travelled in Europe and America giving shows at music halls. He was billed as ‘Mons. Trewey, the Fantasiste, Humoristique, in his Shadowgraph Entertainment’.