[1] First known performance (by NRPS) last known performance on 1969-06-25 by John Dawson [2] First known performance (by NRPS) last known performance on 1969-07-04 by GD [3] Final known performance
First established public use of the band name "New Riders of the Purple Sage". Thanks to Corry Arnold for scanning the Ralph Gleason "On the Town" columns, the "Ad Libs" listings typically found at the foot of them, and other listings during this period. This was microfilm -> digital scanner - not the worst combination, not the best.
listings: San Francisco Chronicle, August 6, 1969, p. 43, billing "New Riders of the Purple Sage (W. Jerry Garcia)" | "Datebook," San Francisco Chronicle, August 8, 1969, p. 46, billing "New Riders of the Purple Sage with Jerry Garcia and Mickey Hart"