John (Marmaduke) Dawson

John (Marmaduke) Dawson (64) longtime Grateful Dead collaborator who cowrote “Friend of the Devil” and developed a devoted following with his psychedelic country group, New Riders of the Purple Sage. Dawson died from stomach cancer in San Miguel de Allende, Mexico, where he had retired several years earlier, on July 21, 2009.(From Life in Legacy.Com)