Shoes and feet fascinated Warhol and feature throughout his oeuvre. After arriving in New York in 1949, he quickly became established as one of the most sought-after illustrators of women?s shoes. He was especially celebrated for his work for I. Miller Shoes, whose reputation was revitalised with Warhol's quirky ads. This drawing illustrates how Warhol completed his blotted-line technique. The linear drawing on the right was hinged to the other sheet of paper. Then, while still wet, the image was printed on to it with this secondary image becoming the original, which was then coloured with ink. Warhol from an early stage employed studio assistants to help him complete these commercial illustrations quickly; this practice would later evolve into the 'production line' techniques in his famous studio, the Factory.