Question: Who died at an earlier date, H. P. Lovecraft or Timothy Leary?

full_context: Document 1: Cthulhu: Cthulhu ( ; for variant pronunciations, see below) is a cosmic entity created by writer H. P. Lovecraft and first introduced in the short story "The Call of Cthulhu", published in the American pulp magazine "Weird Tales" in 1928. Considered a Great Old One within the pantheon of Lovecraftian cosmic entities, the creature has since been featured in numerous popular culture references. Lovecraft depicts Cthulhu as a gigantic entity worshipped by cultists. Cthulhu's appearance is described as looking like an octopus, a dragon and a caricature of human form. Its name was given to the Lovecraft-inspired universe where it and its fellow entities existed, the Cthulhu Mythos.
Document 2: The Call of Cthulhu and Other Weird Stories: The Call of Cthulhu and Other Weird Stories is Penguin Classics' first omnibus edition of works by seminal 20th-century American author H. P. Lovecraft. It was released in October 1999 and is still in print. The volume is named for the Lovecraft short story, "The Call of Cthulhu".
Document 3: Don Barry Mason: Don 'Barry' Mason (1950–2006) was the founder of the Psychedelic Shamanistic Institute (PSI), a networking organisation that encouraged ethnobotany and scientific research into cannabis and other psychoactive plants while contributing substantially to the public debate about drug policy reform. Associates of PSI include: Mathew Atha, Colin Angus, Brian Barritt, Michael Carmichael, Fraser Clark, Paul Devereux, the late John Entwistle, Paul Flynn MP, Ben Ganly, Lee Harris, Mike Jay, Howard Marks, Dr John Marks, Jonathan Ott, Dr Russell Newcombe, Richard Rudgley and Youth.
Document 4: H. P. Lovecraft: Against the World, Against Life: H. P. Lovecraft: Against the World, Against Life (French: "H. P. Lovecraft : Contre le monde, contre la vie" ) is a work of literary criticism by French author Michel Houellebecq regarding the works of H. P. Lovecraft. The English-language edition for the American and UK market was translated by Dorna Khazeni and features an introduction by American novelist Stephen King. In some editions the book also includes two of Lovecraft's best known short stories: "The Call of Cthulhu" and "The Whisperer in Darkness."
Document 5: Harvard Psilocybin Project: The Harvard Psilocybin Project was a series of experiments in psychology conducted by Dr. Timothy Leary and Dr. Richard Alpert. The founding board of the project consisted of Leary, Aldous Huxley, David McClelland (Leary's superior at Harvard University), Frank Barron, Ralph Metzner, and two graduate students who were working on a project with mescaline. The experiments began some time in 1960 and lasted until March 1962, when other professors in the Harvard Center for Research in Personality raised concerns about the legitimacy and safety of the experiments in an internal meeting.
Document 6: Lovecraftian horror: Lovecraftian horror is a subgenre of horror fiction that emphasizes the cosmic horror of the unknown (and in some cases, unknowable) more than gore or other elements of shock, though these may still be present. It is named after American author H. P. Lovecraft (1890–1937), who is largely credited as the first author to pioneer the genre.
Document 7: Cthulhu Mythos: The Cthulhu Mythos is a shared fictional universe, based on the work of American horror writer H. P. Lovecraft. The term was coined by August Derleth, a contemporary correspondent and protégé of Lovecraft's, to identify the settings, tropes, and lore employed by Lovecraft and his literary successors. The name "Cthulhu" derives from the central creature in Lovecraft's seminal short story, "The Call of Cthulhu", first published in the pulp magazine "Weird Tales" in 1926. Richard L. Tierney, a writer who also wrote "Mythos" tales, later applied the term "Derleth Mythos" to distinguish Lovecraft's works from Derleth's later stories, which modify key tenets of the "Mythos". Authors of Lovecraftian horror in particular frequently use elements of the Cthulhu Mythos.
Document 8: The Haunter of the Dark: "The Haunter of the Dark" is a horror short story by American author H. P. Lovecraft, written in November 1935 and published in the December 1936 edition of "Weird Tales" (Vol. 28, No. 5, p. 538–53). It was the last-written of the author's known works, and is part of the Cthulhu Mythos. The epigraph to the story is the second stanza of Lovecraft's 1917 poem "Nemesis".
Document 9: League for Spiritual Discovery: The League for Spiritual Discovery was a spiritual organization inspired by the works of Timothy Leary, and strove for legal use of lysergic acid diethylamide (LSD) for the purpose of meditation, insight, and spiritual understanding. It was in existence during the mid-to-late 1960s, and eventually closed by Leary. The New York Center for the League of Spiritual Discovery, in existence for around a year, was co-founded by Timothy Leary and Nina Graboi in 1966. The center was the first LSD-based meditation center in Manhattan.
Document 10: Timothy Leary: Timothy Francis Leary (October 22, 1920 – May 31, 1996) was an American psychologist and writer known for advocating the exploration of the therapeutic potential of psychedelic drugs under controlled conditions. Leary conducted experiments under the Harvard Psilocybin Project during American legality of LSD and psilocybin, resulting in the Concord Prison Experiment and the Marsh Chapel Experiment. Leary's colleague, Richard Alpert (Ram Dass), was fired from Harvard University on May 27, 1963 for giving psilocybin to an undergraduate student. Leary was planning to leave Harvard when his teaching contract expired in June, the following month. He was fired, for "failure to keep classroom appointments", with his pay docked on April 30. National illumination as to the effects of psychedelics did not occur until after the Harvard scandal.
Document 11: Leary v. United States: Leary v. United States, 395 U.S. 6 (1969) , is a U.S. Supreme Court case dealing with the constitutionality of the Marihuana Tax Act of 1937. Timothy Leary, a professor and activist, was arrested for the possession of marijuana in violation of the Marihuana Tax Act. Leary challenged the act on the ground that the act required self-incrimination, which violated the Fifth Amendment. The unanimous opinion of the court was penned by Justice John Marshall Harlan II and declared the Marihuana Tax Act unconstitutional. Thus, Leary's conviction was overturned. Congress responded shortly thereafter by replacing the Marihuana Tax Act with the newly written Controlled Substances Act while continuing the prohibition of certain drugs in the United States.
Document 12: Turn on, tune in, drop out: "Turn on, tune in, drop out" is a counterculture-era phrase popularized by Timothy Leary in 1966. In 1967 Leary spoke at the Human Be-In, a gathering of 30,000 hippies in Golden Gate Park in San Francisco and phrased the famous words, "Turn on, tune in, drop out". It was also the title of his spoken word album "Turn On, Tune In, Drop Out" recorded in 1966. On this lengthy album one can hear Leary speaking in a monotone, soft-spoken voice on his views about the world and humanity and describing nature, Indian symbols, "the meaning of inner life", the LSD experience, peace and many other issues.
Document 13: Edgar Allan Poe: Edgar Allan Poe ( ; born Edgar Poe; January 19, 1809 – October 7, 1849) was an American writer, editor, and literary critic. Poe is best known for his poetry and short stories, particularly his tales of mystery and the macabre. He is widely regarded as a central figure of Romanticism in the United States and American literature as a whole, and he was one of the country's earliest practitioners of the short story. Poe is generally considered the inventor of the detective fiction genre and is further credited with contributing to the emerging genre of science fiction. He was the first well-known American writer to try to earn a living through writing alone, resulting in a financially difficult life and career.
Document 14: H. P. Lovecraft: Howard Phillips Lovecraft ( ; August 20, 1890 – March 15, 1937) was an American author who achieved posthumous fame through his influential works of horror fiction. He was virtually unknown and published only in pulp magazines before he died in poverty, but he is now regarded as one of the most significant 20th-century authors in his genre. Lovecraft was born in Providence, Rhode Island, where he spent most of his life. Among his most celebrated tales are "The Call of Cthulhu" and "The Shadow over Innsmouth", both canonical to the Cthulhu Mythos. Lovecraft was never able to support himself from earnings as author and editor. He saw commercial success increasingly elude him in this latter period, partly because he lacked the confidence and drive to promote himself. He subsisted in progressively strained circumstances in his last years; an inheritance was completely spent by the time that he died at age 46.
Document 15: Dying to Know: Ram Dass &amp; Timothy Leary: Dying to Know: Ram Dass & Timothy Leary is a 2014 documentary film about Ram Dass and Timothy Leary.
ground_truth: Howard Phillips Lovecraft