Ringo also claims that Paul came back to the studio after they had all left on occasion and re-did his drum parts.
In all the books I've read (including Emerick's) I haven't heard for certain that he re-recorded Ringo's drum tracks (the way Todd Rundgren in Nazz went into the studio, erased the lead singer's vocals, and substituted his own), but Paul gave Ringo LOTS of directions, that is for sure.
