I found a Daniel Gibbs age 21, on the 1870 Census for Pittsylvania, Va. This census was taken in the subdivision North of Dan River Aug 12, 1870.....
Post Office box at that time was Chatham.
You do not mention any dates but maybe this will help you some.
CENSUS FOR 1870...
Susan P? Gibbs......head of household age 43
Robert Gibbs........ " 24
Daniel Gibbs........ " 21
Martha J. "......... " 16
Harriet "......... " 9