Musicians Jerry Garcia - electric guitar (lead), vocals Bill Kreutzmann - drums, perc Bob Weir - electric guitar (rhythm), vocals Mickey Hart - drums, perc Phil Lesh - electric bass, vocals Ron McKernan - organ, vocals 

 No hard evidence that these shows occurred, but Boston Psychedelic Rock Concert Chronology, July-December 1967 (Boston II) and December 8-9, 1967: Psychedelic Supermarket, Boston, MA The Grateful Dead cite a McNally story about the band playing Boston on 12/30 then flying home to SF to jam with Quicksilver at Winterland for NYE (a plan that was foiled by a batch of potent weed brownies).