Grandmother without a surname

Sarah Bass, my four times great grandmother, was either a Stevens or a Farmer. There was a document where a Sarah Farmer married an Edward Bass, but I can't locate it now...and several other Ancestry trees say her name was Stevens, but without anything to document it.

The marriage to Edward may have taken place in 1781 or 1800.  Their children's birth dates are all mixed up. At one point it looked as if Sarah had been born in 1766, and had son John in 1775 (age 9).  That is when I started looking on other trees to find possible birthdates that were different for one or the other of them...such that Sarah would have been within the ages of 14-50 for all her children's births.  I actually moved John's birthday from 1775 to 1780, (which were among the choices others had) and his mother Sarah back to 1758 on my tree. A few of the other Bass trees have those dates, but they also don't have anything to prove the dates they are using!

Apparently the frontier of North Carolina in this period didn't include keeping records of birth dates, and only when property was in conflict for surviving children did the death records become part of the court system.  So there are the many probate records for these families.

If Sarah Bass had been a daughter of James W. Farmer 1707-1761, and Mary Farmer 1721-1768, her family had a coat of arms from England coming to Virginia in its earliest settlement days.

I have several Farmer generations on the tree, but since there's nothing to say she really was a Farmer, I'll not look further at this time.  BUT, there is another marriage into the Bass family of a woman named Farmer, so maybe that time there's something to substantiate it.  I'm looking at that soon.

P.S. That other woman from the Farmer family wasn't definite as any relation to this Sarah Bass' family.