Soundman for the American group "Grateful Dead," introduced LSD in quantity from his lab in the SF Bay Area, participant in Ken Kesey's group "The Merry Pranksters."
The Steely Dan song "Kid Charlemagne", from the album The Royal Scam (1976), is loosely based on Owsley. The lyric "He crossed the diamond with the pearl" suggests that LSD is a cross between cocaine (the diamond) and heroin (the pearl).
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K7SL-5H9 : 16 March 2018), A Owsley Stanley in household of A Owsley Stanley, Tract 1, District of Columbia, Police Precinct 7, District of Columbia, District of Columbia, United States; citing enumeration district (ED) 1-245, sheet 2A, line 17, family 29, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 561. This record indicates he was born in Washington, DC.
"United States Public Records, 1970-2009," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:K18K-G5L : 23 May 2014), Owsley Stanley, Residence, San Rafael, California, United States; a third party aggregator of publicly available information.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VHC7-1MG : 20 May 2014), Owsley Stanley, 12 Mar 2011; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).