This photo provided by the New York Public Library shows Timothy Leary's April 20, 1975, letter to friend Ken Kesey, written from inside California State Prison in Folsom, where Leary was serving time... more 
This photo provided by the New York Public Library shows Timothy Leary's April 20, 1975, letter to friend Ken Kesey, written from inside California State Prison in Folsom, where Leary was serving time on drug charges. Leary saved thousands of documents, correspondence and writings relating to his scientific research into psychedelic drugs in the 1960s, much of it never published but now available to scholars and the public at the New York Public Library, which purchased the collection in 2011 from the Leary estate. (AP Photo/File, New York Public Library, Manuscripts and Archives Division) less 
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Associated Press | Photo By File, New York Public Library, Manuscripts and Archives Division
Wed, Sep 18, 2013 1:13 AM EDT