[sharksfan2000]

Wow, I hate to disagree with everyone (especially Jeremy), but.....

I do think that track is likely to be from the 4 January 1970 show. The sound quality seems the same as the other tracks, and here's Peter Green's intro to "Long Tall Sally":

".....anyway, I'd like to say once more....I would like to say on behalf of this lot that it was really great. And San Francisco is our favorite place, obviously. It think it would be a bit....a bit strange if it wasn't, you know. Because, I don't know if any of you have been all over the rest of America, but.......stay where you are!"

Also, at the end of the track Green mentions "see you all very very soon, I hope", so it sounds to me like that was the probably from the last night of their stand at the Fillmore West, which would have been 4 January.

The bit about having been all over the rest of America sounds like something Green would have said in 1970, not on their first visit to the US in June of '68. Also arguing in favor of the 1970 date is Green's vocal style (contrast this performance with the "Long Tall Sally" we know to be from 6/68, the one that features Paul Butterfield on harp), plus the fact that there are two guitars plus piano audible on this performance.

But.....I do hear that female vocalist, and it sure does sound like none other than Janis Joplin! Could she have joined in on that number in January 1970? She wasn't on the bill (the poster for those dates lists John Hammond opening and The Byrds headlining), but if she was in town maybe she stopped in? Any thoughts about that theory?