L.H.O.O.Q. a late interview (Schwarz 203), Duchamp gives a loose translation of "L.H.O.O.Q." as "there is fire down below". Francis Picabia, in an attempt to publish "L.H.O.O.Q." in his magazine 391 could not wait for the work to be sent from New York City, so with the permission of Duchamp, drew the moustache on Mona Lisa himself (forgetting the goatee). Picabia wrote underneath "Tableau Dada par Marcel Duchamp". Duchamp noticed the missing goatee. Two decades later, Duchamp corrected the omission on Picabia's replica, found by Jean Arp at a bookstore. Duchamp drew the goatee in black ink with a fountain pen,
Marcel Duchamp be considered "true". "The things themselves are not what science can reach..., but only the relations between things. Outside of these relations there is no knowable reality", Poincaré wrote in 1902. Reflecting the influence of Poincaré's writings, Duchamp tolerated any interpretation of his art by regarding it as the creation of the person who formulated it, not as truth. Duchamp's own art-science experiments began during his tenure at the library. To make one of his favorite pieces, "3 Standard Stoppages" ("3 stoppages étalon"), he dropped three 1-meter lengths of thread onto prepared canvases, one at a time, from a height