There was only one proviso: they agreed that the order of the song’s credit would indicate its principal author. They’d continue to work on songs together, one bringing his ideas to the other, but where John was main creator, it would be Lennon-McCartney, and where Paul was main creator, it would be McCartney-Lennon. The credit for 50:50 collaborations would be decided if and when there were any (there’d been none since 1958). Accordingly, as “Love Me Do” and “PS I Love You” were mostly Paul’s songs, Brian took a pen to the Ardmore and Beechwood contract and amended part of the inserted
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