Ruminating n the Beatles and who played what:
Thanks for the replies and interest. I used to have Lewisohn's recording sessions but that book seemed to have disappeared years ago (I need to get it again), and by memory I don't think he always got into the song by song muscianship-not on all of them anyway. I could be wrong but I just don't think anyone at the time thought to catalogue who played what, although some albums would identify some pieces of the lineup (e.g., Rubber Soul, Help). In addition, John, Paul, and George were all multi instrumentalists, and accomplished guitarists and when they got big in the studio, their songs were a little more complicated and things would sometimes get mixed in.
Unlike all the "guitar heroes" in his wake, including his friend Eric Clapton, George Harrison didn't have a particular style or signature. Instead, he played a lot of different styles (e.g., Travis picking, slide), while being at the forefront of what we know now as rock music. I mean, he and the band were kind of defining it with each new album. I believe his mutability as a musician speaks to his great talent. That said, we know he plays lead on most (but not all) their songs, and rhythm on a lot more, but even lead and rhythm are not always well defined.
So, I don't know that there will ever be a definite source on this. I'm probably stuck on the guides, such as they are, and comments from others now on the internet (Beatles Bible), and on my ears.
Listening to What Goes On this morning. A very funky rhythm guitar (my guess is John, but it could be George) and then a beautiful country-style lead from George. Not on everyone's listing but I like it.