The next major development in the history of psychedelic research was the rediscovery of psilocybin by Western society due to the appearance of an article in a 1957 issue of Life magazine written by R. Gordon Wasson detailing his experiences ingesting psilocybin mushrooms in a shamanic ceremony in Mexico. European studies into the use of psilocybin as a psychotherapeutic agent (Duche; Delay "et al.") were published as early as 1961. An article by Pichot about the basic effects of psilocybin on 137 normal and unhealthy subjects appeared in the medical journal Lancet in the same year.