1910, Pablo Picasso, Standing Female Nude [charcoal] -- Metropolitan Museum of Art (New York)

From the museum label: Prior to mailing this large charcoal drawing to Stieglitz in New York, Picasso prominently displayed it in his studio during the fall of 1910, coinciding with the initial work on the Field panels. Depicting a serpentine figure--achieved by use of a restrictive vocabulary of simple curves, ellipses, and straight lines--Standing Female Nude both relates to and departs from other Cubist paintings and drawings of the same subject executed by Picasso that year. Stieglitz acquired the sheet for his own collection and lauded it as exemplary of Picasso's new radical style. Finding it an affront to his aesthetic sensibility, a New York critic disparaged it with a clever slight as "The Fire Escape." This and other Cubist drawings on display at Stieglitz's gallery would have given Field an inkling of what his library panels might look like.

Done