Yes, I did a quick skim of the article about Edith, John DuVall's daughter. There seemed to be alot of tragedy in that DuVall Family; Edith, Clyde and Hosea. We weren't sure if that John was Hosea's brother. Thank you for verifying that.
Hosea is my great grandfather, so we are distantly related by marriage. But, our family has not done alot of research on Hosea's siblings. We hope to get to that in the future. And, the website you listed will help us immensely with that research.
Any info you would be willing to share about John's family would be much appreciated. We have some info on John and Hosea's father, William Manson DuVall(our family's Brick Wall), but we can't add much about Hosea's family. You probably know more about Hosea than we do from the Quincy, IL newspaper articles.