Your's is a very interesting post - Wilkinson Co, MS has been an enigma for me...
There is the 1830 Wilkinson Co, MS census for Saml BARTLETT 0*00 0011-1110 01 (showing Saml b 1770-80 or 1780-90; the * could be a faint 1 or nothing (as if a 1 had been rubbed out)
We also have Daniel BARTLETT m 14 Jun 1823 Wilkinson Co, MS Ann CASON, dau of Thomas.
And purportedly William BARTLETT was born 5 Mar 1823 Wilkinson Co, MS
And Hiram Richard BARTLETT b 6 Mar 1846 Wilkinson Co, MS (Woodville) m 1 Dec 1875 Martha Jane LANE WEAVER (Martha 1m 1870 Samuel WEAVER)
The above William BARTLETT was with Larkin TURNER 35 family in 1860 Jackson Co, LA census; enlisted in CivWar in 1861; m 5 Sep 1865 Jackson Par, LA Crotia A BARNETT (dau of Benjamin); and they are in 1870 Clarborne Co, LA census.
Also in Jackson Co, LA 1850 with Larkin TURNER is a Daniel BARTLETT b 1830 MS, who is also in 1860 Jackson Co, LA census
Larkin TURNER maried 7 Aug 1848 Union Co, AR Marian BARTLETT b 1831 MS; so it appears Marian, William and Daniel are probably siblings which would put them all in Wilkinson Co, MS in 1830 or so time frame.
Also in 1850 Larkin TURNER household is a Richard BARTLETT b 1838 MS, so we might as well add him to this family.
We have DNA from a descendant of the above William BARTLETT.It matches the DNA of a descendant of the Talbot Co, MD BARTLETTs which goes back to the 1600s.It also matches two others: one from MD to AR and one born 1782 GA and m 1805 SC - go figure [I think they all descend from the Talbot Co, MD Quakers, but once someone left the church in MD the records ended on them... - the DNA is the only link we have]
Did folks just "visit" Wilkinson Co, MS and not really live there?I can't find anyone in the census records there...
I don't know if any of this helps you.
BTW we also have DNA on your line back through James Eli BARTLETT b 1817 KY.