Jerry, Bob Weir & Duane Allman live at WBCN Studios, Boston, MA; November 21, 1970
The Grateful Dead had a gig on November 21, 1970 at Sargent’s Gym, Boston, MA. Meanwhile, the Allman Brothers were playing the Boston Tea Party across town. Early on the morning of the 21st, Duane Allman, Jerry Garcia and Bob Weir drop by WBCN-FM in Boston and play a little acoustic music over the air.
I Know You Rider, Big River and Let Me In embedded below.