Fifty years ago Jimi Hendrix performed two Memorial Day concerts in Berkeley CA at which he unveiled unreleased songs, including the portentious “Hear My Train a Comin’ “. He drafted Army buddy Billy Cox   on bass as well as an eager Mitch Mitchell  on drums, who had lost the gig earlier ( at least on paper ) through no fault of his own due to the legal dissolution of the Jimi Hendrix Experience   a year earlier. –Redbeard