Marcel Duchamp and Mary Reynolds Ubi Roi 1921

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"This binding is perhaps the best known and most successful of the collaborations between Reynolds and Duchamp. On November 26, 1934, Duchamp visited his close friend Henri-Pierre Roché in Arago and excitedly reported on a binding that he had just designed for Alfred Jarry’s Ubu Roi that Mary Reynolds was going to execute. Reynolds and Duchamp created out of the binding itself an extraordinarily clever pun. Both the front and back covers are cut-out 'U’s' covered in rich earth tones; the spine is a soft caramel B."