The basic track for "Polythene Pam" and "She Came in Through the Bathroom Window" was recorded at EMI Studios in London on 25 July. The line-up was Lennon on acoustic 12-string guitar, Harrison on lead guitar, Paul McCartney on bass, and Ringo Starr on drums. Lennon sang an off-mike guide vocal on his song, while McCartney did the same on "She Came in Through the Bathroom Window". During the guitar solo on "Polythene Pam", Lennon shouted out words of encouragement ("Fab! That's great! Real good, that. Real good ..."), some of which appears on the finished recording. In his description of the song, author Ian MacDonald likens Lennon's "massive" opening acoustic guitar chords to the Who's "Pinball Wizard", which was a single at the time.