p. 185: Experimentation with yet another new instrument graced the next cut recorded. Initial
takes of I'm Only Sleeping featured the sound of a vibraphone, an instrument similar to a marimba but having metal bars and
rotating disks in the resonators to produce a vibrato effect. The final mix of the song did not include the vibraphone, but years
later Anthology 2 offered a snatch of the original working version complete with the dulcet instrument.p. 228: It was a tricky job in any circumstances. The backing tape would need to be played backwards while Harrison familiarised himself with the new geography of the piece. He would then have to rehearse and try a few phrases, hearing in mind the way the "shape" of the notes change when reversed. Harrison would then record a part against the backwards-running tape, which would afterwards be played back in the standard direction. The new guitar part just added would now sound "backwards" against the regular track. (The master of the backwards guitar solo then was Jimi Hendrix: listen to his 1967 track 'Are You Experienced' for a prime example.)