Hi Julie, My great grandfather was Calvin Cordle Dorsett, the youngest brother of Francis Marion, both of whom were sons of Elijah Dorsett and his second wife, Mary Ann Emerson.
There are so many mistakes regarding this Dorsett line which seems impossible to correct.People are always making assumptions, then claim their theory is the gossip while providing no proof.Such is the case with the theory that Joseph Sr.'s wife's name was Abigail.
If you look at the naming pattern of ALL of Joseph's son's children you will not find one Abigail yet this family uses familiar names for their children.
I find it more plausible to link Abigail as the wife of Joseph Jr, rather than Joseph Sr.
Also, some have mistakenly claimed that there is an elderly Elijah, due to the 1810 census.Joseph Sr. was living with Elijah at the time of this census and he is the elder on this list but Elijah was the head of the household.
As for moving farther back than 1785 and Joseph, I wish you much luck for I've searched for his family for over 30 years and not located a viable link.I don't say this to thwart your enthusiasm but to ask that should you meet with success, please remember me for I, too, would love an answer.