Could William's parents have been Andrew Addison Gibson (1840-1912) who married Catherine Jane Russell (abt 1842-1916). I don't have William as a child but he could have been born after the 1880 census. I have (8) other children for them. Also, James Graham Gibson married Martha Nichols in 1860, before that he was married to Hannah Jane Huskey. James Graham Gibson was the son of Stephen Gibson & Mary A Dockery.