Original 1st printing 7&1/4" (trimmed on the left/right margins from 8&1/2" original width) x 11" concert/event flyer for the 1/14/1967 Gathering of the Tribes/Human Be-In, held at the Polo Grounds in San Francisco's Golden Gate Park. This version lists appearances by counterculture heroes Lenore Kandel, Timothy Leary, Michael McClure, Allen Ginsberg, Gary Snyder, Richard Alpert, Jerry Rubin, Dick Gregory, Lawrence Ferlinghetti and "all SF rock bands" (which included Jefferson Airplane, Quicksilver Messenger Service, the Charlatans, the Grateful Dead and more).
Art by Rick Griffin, image is featured in the Art of Rock on page 197 (plate 2.216).
Thin flat stock flyer is in decent/used (B-/C+) condition; aside from the aforementioned margin trimming, there is a single tack hole in the top center margin and a few light handling dings/pin-prick age spots scattered here and there (nothing serious), but the image area is in really nice shape.
Conditional issues aside, it is still a pretty neat little early-'67 hippie event artifact.