James is as far back as I have been able to research my family, and, even at this level it became very sketchy. There is a very good possibility that there were more children than my gggrandfather - James M. and your ancestor - Mary Ann Crow Canup. Apparently, we have both reached a dead-end on our particular Crow side of the family.
It is, however, guite a coincidence that your name should be Ferguson. My wife's maiden name is Ferguson. Her line, starting with her father is as follows -
Milton Ponder Ferguson, Jr. Deceased1924-2001 Milton Ponder Ferguson, Sn."1900-1976 William Oliver Ferguson1866-1916 Thomas C. Ferguson1816-1893 Thomas C. Ferguson1787-1879 Thomas C. Ferguson1750-1822 Nehemiah Ferguson1724-1789
If you have any further info on either the Crow or the Ferguson family, I would be delighted to here from you.