His grandmother , Mary King , was the daughter of an Irish baronet .
He was the son of Dorothy Rider and Col. John Henry and the grandson of Rev. John Henry , a Scotch Presbyterian minister who came to America in the early 1700s .
son 's grandmother , Mary King , was the daughter of an Irish baronet .
He was the son of Dorothy Rider and Col. John Henry and the grandson of Rev. John Henry , a Scotch Presbyterian minister who came to America in the early 1700s .