QUICKSILVER MESSENGER SERVICE/GRASS ROOTS/MAD RIVER 14×21 music 1967 believed to be first printing. Artist: Bonnie MacLean, Lights Holly See. Unfolded Music Poster (measures 14″ x 21 1/4″ [36 x 54 cm]). Quicksilver Messenger Service/Grass Roots/Mad River, the 1967 rock’n’ roll (rock and roll) music poster (“Bill Graham presents in San Francisco”; BG-87) promoting a concert featuring Quicksilver Messenger Service, Grass Roots and Mad River which took place at the Fillmore Auditorium in San Francisco, California from October 5th to the 7th. Note that this poster features wild art by Bonnie MacLean. Time Honored Vintage Terms of Service. International Postal customers, you may be taxed when the item gets to your country. Please note that vintage items, are at least 20 years old and have had a prior life and will have some normal wear and imperfections appropriate to the age. Any major, or notable flaws will be mentioned in the listing.