Good morning Carol. You probably know about finding Robert on Census reports and in official documents like tax rolls on Tennesse websites. The exact county name might narrow your search. Many of my numerous Phillips were and still are in Hawkins County, TN and thereabouts. Bybee or a variation of it might help since the Phillips and Bybees might have been allied.
If you know any male Phillips of your bloodline please ask them to contact me.
The listing below may be of some help IF IT IS ACCURATE. --Doyle