Notes
Despite all of the contrary billings and such, this was acoustic GD.
Based on evaluation of the newspaper ads, we think these gigs were on 7/27 and 7/28. NRPS tapes from "7/29" and "7/30" seem to come from these dates, as well as the "7/30" acoustic Dead fragment.
ad: Good Times v.3 n.29 (July 24, 1970), p. 16, billing "Mickey Hart and the Heartbeats, with Jerry Garcia"
listing: San Francisco Chronicle July 27, 1970, p. 37, billing "Mickey Hart and the Heartbeats, with Jerry Garcia"
listing: [contra] Berkeley Tribe v.3 no.3 (no 55) (July 24-31, 1970), p. 28, billing Mance Lipscomb