Below is a photo of my wife's maternal grandmother, Viola Fern (Poole) Dunn. She was born on 8 February 1909 in Redmon, Illinois, and died 10 October 1972 in Paris, Illinois. She appears to be in her twenties in this photo.
I can see a definate resemblence between Nancy and her grandmother.
Nancy's mother lent it to us to scan.