This nice thick volume compiled by John David BRANDENBERG and Rita Binkley WORTHY and published by the R. J. TAYLOR Jr. Foundation cite name of individuals and the pertinent volumes and pages to look for whom were qualified voters and their registered oaths after the war. For instance: DENTON, James G. lists 126:22 where to find his name as a qualified voter and then there is the 236:83 to find his registered oath. All of the DENTON are on page 127 in the book mentioned in the subject line above. COOPER is listed on page 103 and 104. BOSTIC, BOSTICK and BOSTWICK is found on page 046. This book and the records that it cites give one some idea of whom is still in GA between 1860 and 1870. If you find that your ancestor did survive the war and did not show up in the 1870 census and he did not swear out an oath upon return to GA then he may have made his oath somewhere else.