"Garcia Band Rehearsals". Probably HMW, but this is not confirmed.
ref: "Steve Brown Papers: Calendar, 1974-1976," Grateful Dead Archive, Special Collections, UC Santa Cruz, MS.338, box 1, folder 4.
Reflections sessions. Even though this was released as a Jerry Garcia album, half the tracks ("Might As Well", "They Love Each Other", "It Must Have Been The Roses" and "Comes A Time") were laid down by the GD. See deaddisc for more.