Charles, your greatgrandfather Dorsey C. Carnell is indeed a descendant of Hubbard.One of Hubbard's sons was John W. Carnell, who married Martha Ann White.Their children were Milton C., Virginia, Rufus, Reddick Copelin, and Dossey Clinton (your Dorsey). An article about this family is on pages 133-134 of Vol. I of the Heritage of Humphreys County, pub. 1979 by the Humphreys County Historical Society. Dossey Clinton Carnell and Lela are shown as having FOUR sons: Robert Clinton, b 5 Sep 1874 Fred Caldwell, b 11 July 1876 Charles Copeland, b 2 June 1878 Dossey Clyde, b 13 Sep 1887
I have the Heritage Books, and the cemetery records. If you would like me to copy these pages for you, please email your snail mail address.