Boy!You have really done some researching.I tend to place families from where they resided and attended church.Since the Abernathy/Abernethys were spread out in Catawba, Lincoln, Gaston and Mecklenburg counties of N.C., I kind of narrow them to certain areas.This is how I'm pretty sure the James Abernathy that married Elizabeth Cox lived in the Mountain Island area.The list of members of the the Methodist church that was next to the Catawba River Basin is not on the internet as far as I know.I will look it up and send an e-mail of the copy.Also, Smith and son, Alexander Abernathy lived in this area and moved to Burke County, N.C. because Alexander was a minister.I have some papers on that.
I know of Judy Rozzelle and her website.Also, look up Paw Creek Presbyterian Church Cemetery on Findagrave.com because there are people that were born in 1800 that are buried there (Coxes, Beatties, Abernathys, Cathys, etc.).
One thing I learned as a genealogist is that Granville County wasn't a county but a propriety before the U.S. became states and united.Lord Granville was granted vast lands from the king of England.This was most of N.C. Later counties became Burke, then Lincoln, then Catawba & Gaston.Mecklenburg was at one time Union County so one needs to know exactly where were these people really living.For instance, was Robert Abernathy really in what was Granville County or what is Lincoln County, N.C. today. Since Lincoln County was established by the time Robert made his will in 1772, it is written as Lincoln County but it could have been Granville County in the 1750's.I haven't really searched that much but I'm sure you have. Thanks again for posting the legal papers of this family.