Green P. Vance, was the son of Wm. Houston Vance and Elizabeth (Campbell) Vance. Wm. H. was b. PA, but moved to Tenn, where he mar. Elizabeth in 1809, then moved later to Madison Co. AL. and to Mississippi when Chickasha lands opened up.
Green P. mar. Millie Jane (Sinclair) b. MS, and they are enumerated in 1860 Pontotoc Co. MS. census with six children.

Millie Jane was the dau of Anderson Sinclair, Sr., and Hester (McMillan) Sinclair.
1860 Pontotoc census:
VANCE, Green Pryor 39 Farmer, b. AL Fth: PA Mth: PA
" Millie Jane 35 wife b. MS NC
" Elizabeth 17 dau MS AL MS
" Martha 14 dau MS AL MS
" Melia (Amelia) dau 12 MS AL MS
" Sarah dau 10 MS AL MS
" James son 8 MS AL MS
" Minerva dau 2 MS AL MS
...................
Sometime in the 1870's, the families moved to Grant Co. AR where Green P's older bro. Enoch H. Vance, a lawyer, had settled. No markers were found but family believes Green Pryor and his wife, Millie J. are bur. in Lost Creek cemetery as some of their children and grandchildren are buried and they were living in area when they passed.
Ancestry gives dates so I'm listing them here as their burial:
"Born in Madison, Madison, Alabama, USA on 4 Dec 1820 to William Houston Vance and Elizabeth Campbell. Green Pryor Vance married Milley Jane Sinclair and had 10 children. He passed away on 26 Nov 1880 in Grant Co, Arkansas, USA.

Green Pryor Vance family tree
Parents:
William Houston Vance 1787 - 1860; Elizabeth Campbell 1785 - 1826
Spouse(s) Milley Jane Sinclair 1824 - 1887
Children:
Minervia Eveline Vance 1859 - 1937 mar: Whitaker
Hester Elizabeth Vance 1844 - 1884 mar: Hardin
Amelia Catherine Vance 1848 - 1885 mar Veazey
Martha Jane Vance 1846 - 1913 mar Swaim, Geo
Jason A. Vance 1852 - 1906 [He is "James on 1860 census]
Sarah Francis Vance 1850 - 1897
William Franklin Vance 1854 - 1859
Mary Vance 1856 - 1858
Jackson Hardin Vance 1869 - Unknown
Jason A Vance 1861 - Unknown "