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 gallery exhibition "Through the Big End of the Opera Glass", printed on translucent paper with the faint inscription: "White to play and win". Grandmasters and endgame specialists have since grappled with the problem, with most concluding that there is no solution. Although Duchamp was no longer considered to be an active artist, he continued to consult with artists, art dealers and collectors. From 1925 he often traveled between France and the United States, and made New York's Greenwich Village his home in 1942. He also occasionally worked on artistic projects such as the short film "Anemic Cinema" (1926), "Box in