How to sit like a lady

Although this has been addressed by e-mail, I will add it here for the sake of reference if need be:

Mrs. Chrisholm, according to old movies and to Emily Post, would have sat with her back up straight and her ankles crossed or her feet together, but not with her legs crossed.

For that matter, Mr. Chrisholm might cross his legs, but would not put his ankle up on his knee.