Original 1st printing 8&1/2 x 11" concert flyer for the Grateful ("Greatful") Dead appearing with Sopwith Camel at the Avalon Ballroom in San Francisco, CA on 8/19-20/1966. Art by Alton Kelley and Stanley Mouse, image is # 22 in the Family Dog/Avalon series. Thin flat stock flyer is in good to very good (B to B/B+) condition; a pair of semi-flattened horizontal creases, light to moderate handling wear, a few stray tiny surface smudges, tack/pin holes at the top/bottom center and a set of very light glue residue marks on the reverse, otherwise a very charming example of this early 1st printing GD/Mouse/Kelley Avalon image at a very fair price. This was reportedly the weekend that Warner Brothers' Joe Smith signed the Dead to their recording contract.