I have made Robert Guyton the younger child as he is not shown on the 1850 AL census in Pickens County alongside his sister, Gilly L. H. Guyton, age 8 months.
Married at City Hall; witnesses are 'Vincenzo Benedetto' (otherwise unknown) and Jeanne (Neuveglise) Ferrari, wife of Albert Ferrari (who is possibly a cousin of Domenico).