 Baudelaire's ' (1857) (full text available here) introduced the Romantic notion that the senses can and should intermingle.Kevin Dann argues that Baudelaire probably learned of synesthesia from reading medical textbooks that were available in his home, and it is generally agreed that neither Baudelaire, nor Rimbaud were true synesthetes.Rimbaud, following Baudelaire, wrote "Voyelles" (1871) (full text available here) which was perhaps more important than ' in popularizing synesthesia.