Who's Frank?
Anybody noticed the character of Frank, whoever that is, is mentioned twice in this film. Once by chit-chatting hotel guests, saying something like: "Haven't you heard the story? Her father asked Frank to look over her, but it was a funny looking over, because he entered the room under the pretext to explain a painting to her..." and then the conversation fades out.
Later, when M asks A who took the photograph of her she said "I don't know. Frank maybe." M responds "Frank wasn't here last year."
Interesting huh? Who is this guy?