McQuinn took that line and then wrote the "Ballad of Easy Rider".
It would not surprise me that there are many changes in the lyrics as sung by one artist vs. the other.
Wow. That's so cool. I love these stories behind the songs. I saw Roger McGuinn, Chris Hillman, David Crosby and a few side musicians perform as "The Original Byrds" in a tribute to Roy Orbison. There's a long legal story about the name they used at the concert.
At the concert I don't recall having seen the incredibly talented singer, songwriter and co-founder of the Byrds, Gene Clark on stage and sadly he passed away the following year. Then two years later, the Byrds Drummer Michael Clarke also passed away.
When the "Original Byrds" began playing after the first few opening lines in "Mister Tambourine Man" out from stage left casually walked a most familiar figure, the subject of this thread, strumming his guitar and singing. If there was a person in the audience who hadn't been a Dylan fan before that, without a doubt they became one in that moment.