A year to the day before the Grateful Dead's skeleton went up at the Avalon, this is what the San Francisco scene looked like: Jefferson Airplane playing a Thursday at the Matrix with JC Burris, the first of two nights, September 16-17, 1965. The Airplane were the club's house band in those opening months -- Marty Balin had built the room for them, and they played it the way a house band does, regularly and without ceremony. JC Burris was a harmonica player and bones player, Sonny Terry's nephew, working the same small stage. No poster exists because the Matrix did not print them and because nobody yet thought a Thursday needed commemorating. Set this next to FD-26 on the same calendar square one year later and the gap is the whole story: from a folk club with a residency to a ballroom scene with its own iconography, in twelve months.