I was wrong. It wasn’t She’s Leaving Home...it was Things We Said Today:
[Vanity] Things We Said Today (Beatles)
http://freerepublic.com/focus/f-chat/3157262/posts
“Things we said today”, is one of many great Beatles songs. “She’s leaving home” is one of the few if not the only Beatles songs that John, Paul, George and Ringo did not play an instrument on. I love the harp and all the other strings in the song.