Looking for Info on S C Mcculley B Circa 1857

My g grandfather,S. C. McCulley, is a mystery. What I know is that he married Elizabeth Hicks in Madison County, Virginia,in November of 1895. According to the marriage license he was born in Scotland and his parents were George and Susannah. He was supposedly an engineer and was a widower. That's all I know. Any information would be greatly appreciated.