The Doors of Perception is an autobiographical book written by Aldous Huxley. Published in 1954, …
[Thus it came about that, one bright May morning, I swallowed four-tenths of a gramme of mescalin dissolved in half a glass of water and sat down to wait for the results.
— The Doors of Perception and Heaven and Hell by Aldous Huxley (Page 16 - 13)
Huxley, Aldous, ‘The Doors of Perception’, The Doors of Perception and Heaven and Hell, Penguin Books, 1960, p13