I first read about these recordings in the 1994 book "You Better Not Touch #2". Lynn Elder (aka Charles Cross in a dress) mentions Milwaukee (1977-02-22) and Baltimore (1977-02-13) as two of these recordings. To quote..."As the story goes, Bruce's sound crew recorded each night of the 1977 tour from microphones set up on the mixing desk and aiming at the PA".
I guess that it possible that Jacksonville is one of these recordings that somehow found the light of day earlier than the other recordings? Many of these tracks made it onto the original LP version of "All those Years" sometime in the early 1980's. The sound quality on this recording is simply stunning. It's hard to believe that some jamoke made this recording that sounds better to my ears (sorry Steve Hopkins) than any other audience recording from the 1970's.
The Toronto recording from 1977-02-13 isn't too far behind. I thought that this show was recorded by by JEMS or friends of that crew. If you listen closely, I swear that you an hear the guys heard yelling the requests from Saginaw 1978 in the background. Looking at the 1985 book "Blinded by the Light", the recording of this show was probably in circulation at that time.
From the recent upgrades from the JEMS team, it seems as if most if not almost all soundboard recordings that we have from the 1970's come via Ed Sciaky. I haven't seen these recordings associated with Ed. This there a known source of these recordings?