In Robbie Robertson’s entertaining biography Testimony, the rock guitarist tells a short story about a conversation he overheard Bob Dylan having with The Byrd’s Jim (a.k.a. “Roger”) McGuinn concerning John Coltrane’s influence on McGuinn when he wrote “Eight Miles High.” 

The setting was Los Angeles, 1966, during a Dylan tour that employed Robertson and, among others, bandmates Rick Danko and Richard Manuel, who are referred to in the excerpt.  The “Levon” in the story was the drummer Levon Helm, who left the tour after a month out of frustration of playing with Dylan during his initial “electric” period, when folk music purists routinely