Drawing Hands, lithograph, 1948.
“A piece of paper is pinned to a surface with four drawing pins. A right hand is busy sketching the sleeve of a shirt on that drawing paper. The hand has not yet finished its work at that spot, but somewhat further to the right it has a left hand protruding from the sleeve, already depicted in such detail that it rises from the plane and in turn, like a living body part, outlines the sleeve from which the right hand emerges.” M.C. Escher, Grafiek en Tekeningen.