This band is actually called Marmaduke And Friends. According to David Nelson's liner notes to New Riders of the Purple Sage, Before Time Began (Relix Records, RRCD 2024), the band was comprised of John Dawson ("Marmaduke"), Jerry Garcia, and members of Doug Sahm's group. Although the liner notes refer to the location as "Pacific Recording," we have used "Pacific Recorders" here, consistent with Joel Selvin's identification in San Francisco: The Musical History Tour (San Francisco: Chronicle Books, 1996), p. 165. He puts the studio at 1737 S. El Camino Real in San Mateo.