John Lennon, Marijuana, Lester Grinspoon & Harvard Medical School

Thanks to David Grinspoon who posted this letter to his father from Beatle John Lennon on his FB feed. 

David Grinspoon is the Astrobiological Chair at the Library of Congress.  His website is Funky Science.

Please click the image of the letter to enlarge and read.

Feel free to repost and share.