You Yanks REALLY have a thing for stealing - the guy helps out on four or five tracks as a session musician - and you want to be able to say that an American was in the Beatles on the basis of that? FWIW, Fox News (an American outfit) called him the Fifth Beatle. http://en.wikipedia.org/wiki/The_Fifth_Beatle shows that he's not the only one to have that tag either... Graham.