During the 1950s, Huxley's interest in the field of psychical research grew keener and his later works are strongly influenced by both mysticism and his experiences with the psychedelic drugs. In October of 1930, the Mystic Aleister Crowley dined with Huxley in Berlin, and to this day rumours persist that Crowley introduced Huxley to peyote on that occasion. He was introduced to mescaline by the psychiatrist Humphry Osmond in 1953; on December 24, 1955, Huxley took his first dosage of LSD. Indeed Huxley was a pioneer of self-directed psychedelic drug use "in a search for enlightenment", famously taking 100 micrograms of LSD as he lay dying. His psychedelic drug experiences are described in the essays The Doors of Perception (the title deriving from some lines in the book The Marriage of Heaven and Hell by William Blake) and Heaven and Hell. The title of the former became the inspiration for the naming of the rock band, The Doors. Some of his writings on psychedelics became frequent reading among early hippies. While living in Los Angeles, Huxley was a friend and mentor to Ray Bradbury.