“With the signing of the agreement concluded between the Arensbergs and the Philadelphia Museum of Art, on 28 December 1950, Duchamp’s work, almost in its entirety, reached the care of a public collection without ever coming into contact with the art market. Duchamp’s comment: ‘I never had such a feeling of complete satisfaction.’ ”

(Ecke Bonk, Marcel Duchamp: The Portable Museum, p. 19.)