Wes Wilson, The Sound, September 23−24, 30 and October 1, 1966 (Winterland); September 25 and October 2, 1966 (Fillmore Auditorium), offset lithograph, 24 1/4 x 13 1/4 inches, BG-29-OP-1, collection of Gary Westford, Salem, Oregon. Photo: Dale Peterson. © Bill Graham Archives, LLC. All Rights Reserved.