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A Renaissance man, Paris was also a violinist with the Georgetown Orchestra, and several of his watercolors and photomechanical reproductions are owned by the Smithsonian Institution.

The fakes, on the other hand, are typically photomechanical reproductions of the originals.

“We did a thorough analysis and have found evidence that supports assertions that a photograph was used to create a photomechanical reproduction,” said Julian Wilson, a specialist with the auction house’s Books & Manuscripts Department.

This one treats Dada — specifically later Dada, from the end of the war to its evaporation in the early 1920s — as an international network, linked by the mail and photomechanical reproduction.

As Zatlin notes, “Beardsley showed the way to bring art to the public speedily and with a lowered cost of production: he exploited the photomechanical technique known as ‘process’ or ‘line-block.’