After Fran's death, I did find some photos and other memorabilia relating to her youth.
Here's an image of her and her mother, seems to be around age 8 or so.
And here is what appears to have been one of her schoolbooks, with her name written on it.
The Avery family dates to the "Avery Hive," a family dwelling near Groton, CN. Here's a picture of Fran and her father at the Avery memorial there. The back of the photo bears the writing "Family Memorial, 1964." That would have made Fran about 13 at the time.