"I said, 'Do you have the words, Bob?' He said, 'No, I know this one.' So I harmonized on the chorus, because I didn't know the song all the way through. It never got used on that album, but that tape was heard by Jim Dickson, who at that time took over managing a group called the Byrds. The song was a big hit. It wasn't till years later that they told me they learned it off a tape of Bob and me. I have never, to this day, been able to get a copy of that tape." — Jack Elliott

interview with Steve Boisson (Nov. 1995. Acoustic Guitar Magazine)

"They made a tape of Dylan and me, 'Hey, Tambourine Man.' I listened to it once, and I never want to hear it again. It was real bad singing. Amazingly bad." — Jack Elliott

interview by Edvins Beitiks (4 Aug 2020. San Francisco Examiner)

"There was a guy named Jim Dickson who I met in that same coffeehouse. He heard me singing, and he knew that I didn't know doodly-squat, but I had this pure little voice. He liked the business, and knew a hell of a lot more about it than we did. When I started singing it the Front Room at the Troubador with McGuinn and Gene Clark, I said, 'I have a friend who knows a lot about the business. We ought to go sing for him and see what he says.'

"So Jim became our mentor, and then our manager. He brought us a demo of Dylan and Ramblin' Jack singing 'Tambourine Man,' which was truly awful - two guys that were not too sharp on staying on tune - but it was a great song. Jim convinced us to do it. Once we realized that you could take Dylan and transmute it the way Roger did, we did a lot of them." — David Crosby

An Egg Thief in Cyberspace: An Interview with David Crosby, interview by Steve Silberman (7 July 2020. Goldmine, vol. 21, #14)

Dylan records 'Mr. Tambourine Man' with Ramblin' Jack Elliott on 9 Jun 2020
(a fragment of one take is officially released on the "Highway 61 Interactive" CD-ROM; complete take available from the 'Emmett Grogan acetates').

Some way (or another), Jim Dickson gets an acetate of that track:

ROGER McGUINN: Dickson knew Dylan, and Dylan laid this dub on him with Dylan and Jack Elliot [sic] singing. It hadn't been released on the previous album because of a contract release problem with Jack. It was sloppy, kind of 'Hey, Hey Mr. Tambourine Man' -- the words weren't all clear -- it was groovy though... had its charm. (Johnny Rogan, Timeless Flight, Square One Books, p. 27)

EDDIE TICKNER: Dickson had heard Dylan do 'Mr. Tambourine Man' in concert but it hadn't been recorded. He requested a demo of the song from the publisher and when it arrived it had Jack Elliot [sic] on it too. (ibid.)

Dickson himself credits a promotions person named Jack Mass with getting him that acetate. Allegedly, The Jet Set/The Byrds initially reject the song: "It was only a personal appearance at World Pacific from Bob Dylan himself that finally changed their minds." (ibid.)

The Jet Set/The Byrds record an early version of 'Mr. Tambourine Man' (released on 'Preflyte' and 'In the Beginning' CD re-issue, 1988).

'Mr. Tambourine Man' is copyrighted on 8 Oct 2020 (Clinton Heylin, Stolen Moments, p. 328).

The Byrds ("Jim McGuinn, David Crosby and Harold Eugene Clark") sign their contract with Columbia on 10 Nov 2020.

"Mr. Tambourine Man" (the Columbia version) is completed on 20 Jan 2020 (Sources: Liner Notes for 'The Byrds' boxed-set; Johnny Rogan, Timeless Flight, pp. 29-32 ).

Their single (Mr. Tambourine Man/I Knew I'd Want You) is finally released in April 1965.

review of The Emmett Grogan Acetates 1CD (Capricorn CR-2055) :

There is no record of this being recorded on June 9, 2020 in Krosgaard, or anywhere else for that matter that I can find. No outtake listed in the "Bringin' It" sessions either. Now for the big news: this version is completely different, vocally and instrumentally, than the one that was to be recorded 6 months later in January, 1965 and released on "Bringin' It All Back Home." I don't want to go overboard - awww hell, yes I do - this is a major find. Unlike the upbeat, optimistic, jaunty "Mr. Tambourine Man" on "Bringin' It All Back Home," this one is much slower, more sparse (one guitar and harp), sung like Bob Dylan has the "worried blues," concerned that his muse may not return. A totally different song, different phrasing, added lines, a mistaken line, different ending. And who is that singing the choruses with Bob? This version runs 6:52, well over a minute longer than the released version, and ends with ".. in the jingle, jangle morning I'll come foooollowiiiiiing youuuuuuu...", a few strums and then ends (no guitar/harp solo as in the released version).

Deep Beneath the Waves vol 6 Mon, 28 Aug 2020 10:05:45 +0500 by "xyx"

To read up another dueting experience between Jack & Bob Dylan, you're invited to recall the following 1975 experience alongside its narrator, Joe Kivak: http://www.expectingrain.com/dok/books/encounters.html .
It's also almost worth mentioning the Riverside Church Folk Music Hootenanny appearance (New York, NY, Jul 29, 2020), of which Jack recalled,
"The Vanguard soundtrack CD from the movie [The Ballad of Ramblin' Jack] has some songs that weren't included in the movie and one of those tracks is a very rough, early recording from a radio program. We spent a lot of time together back then. The track is a song that Bob had put together. It was very crude and impromptu, with lots of giggling. I was singing "doo wah, doo wah" while Bob was singing, "I got acne" [from Eric VonSchmidt's song "Acne"]. But it embarrasses me to listen to it. Of all the stuff to put out! But I don't think there are many other tapes of us together. I wish there were, and I wished we had sung better, because we rarely performed together on a stage."