Yes, I believe did see an article about a young Vanderpool man who was 18 when he passed away in a train incident down in Iowa. In that article, it did mentionthat Mrs. W C Gibson was being raised by Mrs. Vanderpool. My great grandmother did say that the adoption of a Native American child was prohibited and could not be officialized.
My grandmother had a newspaper article of either Matilda or her daughter Willah being interviewed of her born heritage to the Kiowa tribe.
Could you possibly email me the information of her mother, Hester Ann Smith Rector, being Cherokee? I haven't seen that information yet so it would be interesting!