Readymades of Marcel Duchamp to turn up any identical matches to photographs of the originals. However, there are accounts of Walter Arensberg and Joseph Stella being with Duchamp when he purchased the original "Fountain" at J. L. Mott Iron Works. Such investigations are hampered by the fact that few of the original "readymades" survive, having been lost or destroyed. Those that still exist are predominantly reproductions authorized or designed by Duchamp in the final two decades of his life. Shearer also asserts that the artwork "L.H.O.O.Q." which is recorded to be a poster-copy of the "Mona Lisa" with a moustache drawn on it, is
Marcel Duchamp example of Duchamp's association with Dada was his submission of "Fountain", a urinal, to the Society of Independent Artists exhibit in 1917. Artworks in the Independent Artists shows were not selected by jury, and all pieces submitted were displayed. However, the show committee insisted that "Fountain" was not art, and rejected it from the show. This caused an uproar among the Dadaists, and led Duchamp to resign from the board of the Independent Artists. Along with Henri-Pierre Roché and Beatrice Wood, Duchamp published a Dada magazine in New York, entitled "The Blind Man", which included art, literature, humor and commentary.