I've been away from my computer for a few days and just saw this. How sad. I'd heard Marmaduke was in Mexico in ill health, but it still is a shock. Way too young. I saw NRPS numerous times. In 1974 I used my friend's draft card to get into the Keystone Berkeley (I was 19 and there was a 21 requirement) to see the Riders. At this time Jerry had left and Buddy Cage was playing pedal steel. As they climbed back on stage for the second set, Jerry showed up with his Strat (Alligator) and played the second set with them. Another time, I saw them do a wonderful acapella version of Amazing Grass (how sweet the weed, etc.) And, of course not only did Dawson write many of the Rider's best loved tunes (Glendale Train and Last Lonely Eagle to name a couple), he co-wrote one of the greatest Dead songs: Friend of the Devil.
May the Four Winds Blow You Safely Home.
Bill, tgo