Oddly chiseled stone-people arranged in a Sistene Chapel tableau reach across this Blues Project and The Mothers offering. One of the women figures on the left wears a cross, a frequently used but subtly hidden Wilson symbol, on her headdress.
The 1st printing of the poster is on rough stock and displays a darker orange color than the reprint. The original pre-concert printing measures 13 11/16" x 20 3/4".
The 2nd printing is lighter orange on smooth plated stock. This post-concert reprint is significantly longer, measuring 13 5/8" x 21 1/4".
When the Avalon Ballroom and Bill Graham's Fillmore Auditorium began to hold weekly dance concerts, Wilson was called upon to design the posters. He created psychedelic posters from February 1966 to May 1967, when disputes over money severed his connection with Graham. Wilson pioneered the psychedelic rock poster. Intended for a particular audience, "one that was tuned in to the psychedelic experience," his art, and especially the exaggerated freehand lettering, emerged from Wilson's own involvement with that experience and the psychedelic art of light shows.