I hope I have the right information for you. I am part of the Oslin clan, and Bertha Parr was my great-grandmother, married to Samuel Jesse Oslin, Jr.. I am attaching some geneology, the only that I have from that side of my family. My grandfather was Samuel Glenwood Oslin, and my grandmother's name was Catherine Methvin. They had my father prior to his marriage to Edna, and since my father ended up being adopted out at age 1, I never had the opportunity to meet him. Although, I did end up knowing Catherine. She passed in 1998. I hope this helps with your documentation.