Box 21

Duchamp, Marcel. "Opposition and Sister Squares are Reconciled by M. Duchamp & V. Halberstadt (L'Opposition et les cases conjuguées sont réconciliées par M. Duchamp & V. Halberstadt)," deluxe leather bound edition. Photo by Nathan Rabin.

Duchamp, Marcel. "Opposition and Sister Squares are Reconciled by M. Duchamp & V. Halberstadt (L'Opposition et les cases conjuguées sont réconciliées par M. Duchamp & V. Halberstadt)," 1932. Photo by Philadelphia Museum of Art.

Duchamp, Marcel. Bookbinding for "Ubu Roi" by Alfred Jarry, 1935. Photo by the Philadelphia Museum of Art.

Duchamp, Marcel. Photograph of "Prière de toucher (Please Touch)," Numbered edition of exhibition catalogue for "Le Surréalisme en 1947" (Paris: Pierre à Feu/Maeght). Photo by Bacci Attilio.

Duchamp, Marcel. Photograph of "Prière de toucher (Please Touch)," Numbered edition of exhibition catalogue for "Le Surréalisme en 1947" (Paris: Pierre à Feu/Maeght). Photo by the Philadelphia Museum of Art.

Duchamp, Marcel. Photograph of "Prière de toucher (Please Touch)," Numbered edition of exhibition catalogue for "Le Surréalisme en 1947" (Paris: Pierre à Feu/Maeght). Photo by Geoffrey Clements.

Duchamp, Marcel. Photograph of cover of checklist for Duchamp/Picabia exhibition at the Rose Fried Gallery. New York, 1953-1954. Photo by the Philadelphia Museum of Art.

Duchamp, Marcel. Photograph of cover for the catalogue "Surrealist Intrusion in the Enchanters' Domain," 1960-1961, D'Arcy Galleries, New York.

Duchamp, Marcel. Photograph of catalogue "Jacques Villon, Raymond Duchamp-Villon, Marcel Duchamp," 1957, Solomon R. Guggenheim Museum, New York.

Duchamp, Marcel. Photograph of frontispiece for "Sur Marcel Duchamp" by Robert Lebel, 1959. Photo by Bacci Attilio.