Thanks for posting the historical early recording from Feb 1967 by Quicksilver.  If there was ever more evidence needed that the jam bands of the era (Dead, Quicksilver, the Airlplane) were jumping off from a blues base, well, listen to this.  The Stones were doing the same thing in England, as were the Who.  They all needed time to develop their own sound and this '67 recording is a marvelous archive of this evolution.
The concert notes mysteriously fail to give the rest of the story of that night however.  Dino Valenti (Valente, etc) joins QMS for three songs that made the tape before the Airplane took over, but the notes stop with the performance of "Mona."   If one knows the history of Valenti, this was between one of his jail terms and over almost three years before he joined them and they recorded "hits" like Fresh Air.  These three songs are the epitomy of what those of us who loved QMS before Valenti did not like about his joining the group.  Those around then will know what I am talking about; Dino was just never my cup of tea....