I think my mother has that picture. Judy told me that she gave all of Sadie's things that related to our part of the family to my aunt Janice. Janice in turn gave that photo, as well as a few others, to mom.
I never met Sadie, but my mom thought the world of her. My mother just happened to be in California visiting me when Sadie died. I doubt she would have been able to attend otherwise. She lives here in Virginia and doesn't fly.
I'm sorry to hear that you and David aren't close. It is hard for me to understand why relationships seem to sour so easily in this family. I'm sure it's complicated, but I hope you can find a way to make peace with him. I have discovered in the past few years, that Grandpa's estrangement was probably way overblown. Sadly, it's too late to change that now.