James, I'm Nancy from Midland and my g-grandfather is Sampson Harris. Here is what I know from my mom, Lillian Harris Vos and Wanda Harris Thweet.
* Granny always said she was the g-niece to Cynthia Ann Rogers who was (b: 1787 - Burke County NC). She was the 3rd wife of Joseph Dempsey Coker. His father (b: 1769 VA - d: 1855 - Marion County, AR) was William (Buck) Coker and ( b: 1775 - d: 1820 AR) & Nancy Lee his mother.
* Granny also said there were was family members named Wood. Buck Coker had 10 children: the last daughter married (b: 1810 TN - d: ?) Nancy Jane Coker, she married George Washington Wood.
* Also was told her father was killed by bushwackers & her mother later died from a broken heart and Granny went to live with an aunt who's husband abused her. Buck Coker 5th son (b: 1790-96 Burke County, NC - d: abt 1850 AR) Leonard Coker. His wife unknown, but some think her name was Frances Coker. Their 2nd child was (b: (abt.1828) Seaborn S. Coker married (m: Amanda J. Predella Tucker), during the Civil War he was allegedly killed by Bushwackers.
* The name Coker can be spelled many way Colcher, Crocker, Copher Coffer, Cofer. I was told she also had 2 brothers.. She also said her father was from TN and mother from AR. While searching for a Mary L. Coker b: 1871 in the 1880 census, I came across a Mary L. Cofer, age 9 living in Barren, Jackson AR showing to be a niece to aunt Mary & Lonny O'Banon. Then I found two more children, both boys named Benjamin Cofer age 12 and William Cofer age 14 living in Barren, Jackson, AR showing to be nephews of William Cobb and Sarah Cobb. All 3 children show their father b: TN and mother b: AR. Her brothers, I was told, they moved to Illinois or Indiana.
There is book called "Our Coker Kin" by June B. Barekman, you can get it from an Interlibrary Loan. You will found it very interesting, also do a search on the web for "The Turnbo Manuscripts" by Silas Claiborne Turnbo. He lived with and around the Cokers in Boone and Marion counties.
Hope this helps a little, let me know what you discover as well.