Fineart.sk have some rather nice excerpts from drawing books that show general proportions for the human head, like the attached. I have found them rather handy doing my first head model; it might be worth a look to reinforce your photos.
I don't think the ear goes between the nose and the lips, that would put it a bit far down the head.
Last edited by Witchy; 15-11-2003 at 03:58 PM.