I'm a little confused about that high harmony...
In the 1964 show by pc31 (where they did "Rocking Robin" and "Just One Look"), Graham Nash didn't seem to be on stage.
Yet that high harmony sounded just about the same as on my Greatest Hits CD.
Did he come on board later, for their monster hits (Carry Anne, Bus Stop, Carousel, Look Through Any Window)? Or are some of those hits recorded with his predecessor singing, not Graham Nash?
And, OT a bit, it seems like there must have been a queue of excellent VERY high harmony singers around ... I always thought Paul was pretty high, but those guys make him seem like a baritone in comparison ... no falsetto ... incredible!