August 7, 1966 was a Sunday, and it produced one of the most extraordinary bills of the entire San Francisco scene — not a Bill Graham show, and not an Avalon dance, but a benefit: the 3rd Annual Children's Adventure Day Camp Benefit, a marathon afternoon-and-evening at the Fillmore Auditorium that gathered nearly every band in the city onto one flyer. The surviving artifact is catalogued as AOR-2.68 (plate 2.68 in Grushkin's "The Art of Rock"); a Heritage Auctions record and rockposters.com both preserve it, and it reads like a scene census: Big Brother and the Holding Company with Janis Joplin, Quicksilver Messenger Service, the Grass Roots, and a long tail of acts and troupes — the Committee, the San Francisco Mime Troupe, the Jook Savages, the PH Factor Jug Band — all for a children's summer camp.

The flyer also advertises the Grateful Dead. Here honesty requires a flag: the Dead are on the poster but did not play. Jerrybase, the authoritative Garcia/Dead show database, marks the band's August 7, 1966 Fillmore date as canceled — the Dead had played Vancouver on August 5, and by one account their van broke down on the way back. So the chronicle keeps the Dead in the printed bill — that is what the artifact says — while noting plainly that the band did not appear. This is exactly the kind of gap between what a poster claims and what the stage held that the scene's careful chroniclers spend their lives untangling.

What is solid is the shape of the day: a non-commercial, community benefit that could nonetheless summon Janis Joplin and half the Avalon's roster on a Sunday, months before any of these bands were nationally famous. Big Brother in August 1966 was still a local band; Joplin had joined only that June. To see her name on a children's-camp benefit flyer, well down a list that also includes a jug band and a mime troupe, is to see the scene at the moment before the money and the fame arrived — when a Sunday at the Fillmore could still be, literally, a fundraiser for a summer camp. The designer of AOR-2.68 is Mary Kay Brown, an attribution that holds up across independent records — the signature in the artwork, the Heritage Auctions listing, and PosterCentral all name her — so this is one of the rare early credits that is solid rather than conjectural.

The same Sunday, the Family Dog was running the other half of its Bo Diddley weekend. FD-20 — the Mouse-and-Kelley "Five Men in a Boat" (also called "Men in a Rowboat") — promoted Bo Diddley, Sons of Adam, and Little Walter at Longshoremen's Hall. The poster is a genuine puzzle: the FAMSF and Denver Art Museum title records describe FD-20 as a single sheet advertising a three-night, multi-venue package — Longshoremen's Hall on August 5 and 7, the Avalon on August 6 — which is why the Bo Diddley engagement threads across three of this week's early dates and two different Family Dog catalog numbers (FD-19 for the Avalon "Dollar Bill," FD-20 for the Longshoremen's "Five Men in a Boat"). The numbering is muddy enough that one archival source swaps the two; the weight of the museum records puts "Five Men in a Boat" at FD-20 and Longshoremen's Hall, and that is how we file it, with the poster's own "Aug 5 & 7" claim noted rather than smoothed over.

Later years thin out on this date. In 1968 the Fillmore West was mid-run on the Chambers Brothers leg of BG-132 (Lee Conklin's six-night poster), and in 1969 the Fillmore West was on the second night of the Butterfield / It's a Beautiful Day / SRC bill under BG-185 (David Singer) — both engagements the chronicle heroes on their opening days elsewhere this week. But August 7 belongs to 1966, and specifically to that children's-camp benefit: the whole city on one flyer, Janis Joplin near the bottom of it, and the Grateful Dead printed but — the record strongly suggests — absent.