Hi Cousin. My grandmother was Katherine E. Graul, one of Charolette's sisters. She married Urban Frick. My mother's maiden name was Theresa Frick.
I've already researched the Graul family. I put together record containing 1448 names and wrote a 96 page manuscript.It traces the family back to Germany and shows most of the descendants of George F. Graul and Barbara Noth, Joseph Graul's grandparents. It includes Joseph's second family. I assume you know he re-married after Caroline died.
As a family member I'd be happy to give you all the info I have. You can correspond with me at email@example.com.