Obituary of May 29, 1868
"Col. Robert McMillan was born on 7th January 1805 near the city of Belfast, Ireland, and died in Clarksville, Ga., on 6th May 1868. From the son of the deceased I learn that he came to America about the year 1832, and engaged in mercantile pursuits in Augusta, Ga. In 1836 he was married to Miss Ruth A. Banks, of Elbert co., where he settled and continue his mercantile pursuits until 1839, when he abandoned this for the profession of the law and legislator." F. G. Hughes"
He put his heart, soul, and money into the Confederate cause and raised and commanded the 24th Georgia Regiment. Although nearly sixty years old he was noted for his bravery. When General Thomas R. R. Cobb fell, mortally wounded at Fredricksburg, Col. McMillan was placed in temporary command and would have been made Brigadier-General but his health failed and he came home to die."