Papa and Mulvaney Kids

This is another of the pictures that John Griffin, Jr. sent me. Papa's the grown man in the dark hat (as far as I know, we don't know the man with his back to the camera). I believe I recognize the two boys in the dark coats as the Kessell boys (George in the glasses and Steve without?), and John says the little girl behind George is Nan, although I can't see her well enough to tell. If I were to guess who the other boy and the girl are, I'd say they're Tom and Grace Mulvaney, but I can't really tell. Does anyone know better? It looks like they're feeding pigeons.