A perhaps stupid question, but I can’t figure out how to search for an answer to it.

I have heard two versions thus far of Going Down the Road Feeling Bad where Garcia plays a Southern-sounding theme toward the end of the song.  He plays the theme twice through, and it is a sweet little thing that sounds like a quote from a Civil War-era folk tune or maybe a bluegrass melody.  Kind of like something Duane Allman or Dickey Betts would work into an Allman Brothers song back in the day.

One example is in the MSG Felt Forum show 1971-12-05, the other, and better example, is 1971-08-26, my Gaelic Park show, about 5:25 into the track.  The Gaelic version features some amazing Phil Lesh bass alongside Garcia’s playing.

Can anyone help?