The music recording also contains conversation and banter
A tape of a Beatles recording session in which John Lennon and Paul McCartney are heard cracking jokes and breaking into giggles, is to be auctioned off.
The 30-minute tape, thought to have been recorded in 1964, is expected to fetch between £8,000 and £12,000 when it goes under the hammer on Tuesday.
It includes a recording of the band's attempt to record I'll Follow The Sun.
The tape was found during an attic clearance by the son of a man who had worked in the music industry.
The reel-to-reel recording contains songs composed by John Lennon and Sir Paul McCartney as well as versions of other artists' tracks, according to auction house Cameo.
'Funnier and funnier'
During the recording of I'll Follow The Sun Lennon says: "I'm not looking at you," to which McCartney replies: "You were".
Lennon then says: "It's just going to get funnier and funnier as the evening goes on."
McCartney adds: "Let's just try this once more and if it's the last one that's hard lines."
The band managed to complete a recording of the song without interruption later in the tape.
The man who found the recording wished to remain anonymous, but the auction house have revealed that it was discovered in the north of England.
In a recent auction in London last month the drum skin used on the cover of The Beatles' Sgt Pepper album sold for £541,250.