Your Great Grandmother Edith (Josephine Angeline Copp) was adopted into my Masten family. She was adopted by my great great grandfather James W. Masten and his wife Annie Ferrell Burlingame Masten (who was also adopted when she was young). They adopted her after my great aunt passed away of influenza in 1918 when she was 15 years old.
I reached out over 5 years ago to Carl Walters when I was curious who the little girl was in our family album. My mom filled me in and I reached out to Carl to find out more.
Feel free to message me and I can send you a picture. I have one in my family tree of her. Check "Schwarz family tree"