Other songs Paul wrote about Jane: We Can Work It Out You Won't See Me I never heard I've Just Seen A Face was about Jane. It was written in 1965, over 2 years after he met Jane. More likely about a girl he met he'd like to replace her with! P.S. Before someone says, what about And I Love Her? Paul said in an interview that it wasn't written with any girl specifically in mind. (I bet Jane loved hearing that!)
According to Peter Miles' book both of those songs were written on the piano at the Asher house. Paul would have had a hard time explaining to his girl friend why he wrote a song about another girl at the Asher house.