Original 1st printing 14&1/8 x 20" concert poster for Chicago blues legend Howlin' Wolf appearing with Big Brother & the Holding Company (featuring Janis Joplin) appearing at the Avalon Ballroom in San Francisco, CA on 9/23-24/1966 (*show canceled). Art by Stanley Mouse & Alton Kelley, image is # 27 in the Family Dog/Avalon series. Medium-thick flat vellum stock poster is in fantastic near mint (A- to A-/B+) condition; only the slightest amount of handling in the left margin and a tiny bend in the lower left corner, otherwise it's an absolutely STUNNING example of this classic Mouse/Kelley Family Dog image with VERY strong/rich red ink. We also have the MEGA-scarce Big Brother-issued alternate handbill from this show listed separately.