Surrealist art movement, such as Remedios Varo and André Masson. Other early examples include Antonin Artaud who writes of his peyote experience in Voyage to the Land of the Tarahumara (1937) and Henri Michaux who wrote Misérable Miracle (1956), to describe his experiments with mescaline and hashish. Aldous Huxley's The Doors of Perception (1954) and Heaven and Hell (1956) remain definitive statements on the psychedelic experience. Albert Hofmann and his colleagues at Sandoz Laboratories were convinced immediately after its discovery in 1943 of the power and promise of LSD. For two decades following its discovery LSD was marketed by Sandoz as an important drug for psychological and neurological research. Hofmann saw the drug's potential for poets and artists as well, and took great interest in the German writer Ernst Jünger's psychedelic experiments. Early artistic experimentation with LSD was conducted in a clinical context by Los Angeles–based psychiatrist Oscar Janiger. Janiger asked a group of 50 different artists to each do a painting from life of a subject of the artist's choosing. They were subsequently asked to do the same painting while under the influence of LSD. The two paintings were compared by Janiger and also the artist. The artists almost unanimously reported LSD to be an enhancement to their creativity. Ultimately it seems that psychedelics would be most warmly embraced by the American counterculture. Beatnik poets Allen Ginsberg and William S. Burroughs became fascinated by psychedelic drugs as early as the 1950s as evidenced by The Yage Letters (1963). The Beatniks recognized the role of psychedelics as sacred inebriants in Native American religious ritual, and also had an understanding of the philosophy of the surrealist and symbolist poets who called for a "complete disorientation of the senses" (to paraphrase Arthur Rimbaud). They knew that altered states of consciousness played a role in Eastern Mysticism. They were hip to psychedelics as psychiatric medicine. LSD was the perfect catalyst to electrify the eclectic mix of ideas assembled by the Beats into a cathartic, mass-distributed panacea for the soul of the succeeding generation. In 1960s counterculture Leading proponents of the 1960s psychedelic art movement were San Francisco poster artists such as: Rick Griffin, Victor Moscoso, Bonnie MacLean, Stanley Mouse & Alton Kelley, and Wes Wilson. Their psychedelic rock concert posters were inspired by Art Nouveau, Victoriana, Dada, and Pop Art. The "Fillmore Posters" were among the most notable of the time. Richly saturated