I see this is an old post, but if you are still looking for information, I can help you out a little. John Graham was the brother of my great-grandmother, Mary Ann, she was married to James Carroll, and John Graham's wife, Mary Lynn, was actually the daughter of my great-aunt, Ellen Lynn, nee Carroll -- Ellen and James were brother & sister. If you want or need more information on them, let me know, I've just started getting serious about entering info into my tree, but I'd be happy to share what I have. Regards, Nancy