How old was your William Grant. I am also looking for a William and Hannah McDonal Grant that was my ggggrandparents, but they lived in Phila., Pa. in the middle 1800's, but what also caught my attention was your mother last name Cosby , I am a Cosby and I have been looking for a long lost sister that my father James Rufus Cosby had before he married my mother Bernice Cosby.