S & G release 4 track live EP download. I believe this version of Bridge was included in the Live '69 compilation and the 40th anniv. 2 CD expanded Bridge. The other 3 appear to be songs from Bridge whose live versions are officially unreleased. This gig was several months prior to Bridge album being released. The Boxer had been released as a single earlier in '69.
https://www.rollingstone.com/music/music-news/simon-and-garfunkel-bridge-over-50-942112/
https://ultimateclassicrock.com/simon-garfunkel-live-at-carnegie-hall-1969/
https://www.rollingstone.com/music/music-news/simon-and-garfunkel-bridge-over-50-942112/
https://ultimateclassicrock.com/simon-garfunkel-live-at-carnegie-hall-1969/