I'm not sure I can help, although I'd be happy to. I have your line through father Vernon W, grandfather James Monroe, gr-grandfather John Wesley, gr-gr-grandfather Elisha and Elisha's father John (1750-1846??) This is mainly thanks to cousin Alton ERRINGTON who I imagine you've been in touch with. We think the details about John are a bit dubious!
If you want to share any further details you're welcome to e-mail me directly on: firstname.lastname@example.org