Jerry is the only player listed, so it seems likely these are overdubs. A tune from BvTatCN in B-minor is "Flowers Of The Night", though JG is not credited on it. Garcia is credited with steel on "Your Mind Has Left Your Body", one of his last documented steel sit-downs of the 1970s. We aren't sure that he played it here, but the proximity to the steel playing for Link Wray's Be What You Want session in "early February" raises the plausibility.
