Notes
"Diga session." Venue seems almost certain to have been Hart's Barn studio in Novato. Not sure about Garcia's presence, but there is evidence he came at least one of these Wednesdays (per Entry for ca.February 10, 1976, Steve Brown Notebook, Grateful Dead Archive, Special Collections, UC Santa Cruz, MS.338, box 1, folder 8).
Ref: Grateful Dead Archive, MS332, Ser. 2: Business, Second Accrual (preliminary), Box 1, folder 4: [folder title here]. Special Collections, UC Santa Cruz.