I am a family researcher, and Peyton Davis Downey is in my husband's family line through the marriage into the Fortenberry clan in Mississippi/Louisiana.

P.D. Downey is one of my husband's cousin's grandfathers. Check out what she wrote to me, which I added to my family tree posting on RootsWeb. I have listed Peyton Colbert Downey but nothing beyond him, as I did not have the information or sources.
http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=cal-gal&id=I5563