Are you still looking for information on Osjetea?
Osjetea was my grandmother's half sister. I know a little about her and have even more rumors. She was a character! My mother has 3 photos hanging at her house that Osjetea hand tinted (my parents' wedding photo and a pic each of my brother and I).
I also have quite a bit of information about the Briggs line (her father's side), but I don't really know much about her mother.
Let me know if you still need information!