> I may be a descendant of Charles & Amelia Abernathy if they had a daughter, Adeline.
I have an un-named daughter of the appropriate age who is very probably your Adeline.
> In the 1860 census for Wilson Co., there are 2 Adeline Adams and one is living next to Amelia in Dist. 20. The other > is living in Dist. 23 which I know to be my Adeline (Edwin now deceased). I suspect there may be only 1 Adeline but > she got caught in the census twice (I can't be sure though as the data is slightly different between the 2).
> Any ideas?
I think the one living next to Amelia isn't related at all, simply the widow of a different Adams, possibly not even one related to Edwin. I suspect the one in District 23 in 1860 _is_ Adeline, daughter of Charles and Amelia Abernathy. It could be that Edwin could not obtain a farm near his prospective in-laws before he married. I also note the fact that the Abernathys were in District 23 in 1850 when Edwin, Adeline and family were in District 20. Clearly a redefinition of Districts occured sometime between 1850 and 1860.
Alas, I have no definitive evidence to support my hypothesis at this time, simply many years of trying to figure out these sorts of things.
All I can suggest is that you just keep digging.... some clue may eventually turn up that provides the answer.