[Crowbob]

As collaborators, John and Paul would be difficult to surpass. Paul would hum or plink a melody and John would fill in the middle eight like a spontaneous musical conversation. George Martin couldn't quite understand how they did it but he knew immediately that each was complimenting the other's genius, somehow. With his classical training and musical insight Martin also understood his role was to facilitate their progress. He was pretty much the only one of the bunch who could read music.