According to Sparta Recorder & Law Journal (Jan. 7, 1832), Pryor Vest died on December 29, 1831 in the Warren County jail from Typhus Fever.

Details of his death was published with reassurance his cause of death was not due to mistreatment of prisoners.

Why Pryor Vest was in prison, is unknown. Earlier Warren county records have been lost due to a court-house fire in 1852.

We do know that Pryor Vest was charged with assault in 1807 in Wilkes County, North Carolina, but was found not guilty. Wilkes County, NC, Pleas & Quarter Sessions Court Minutes 1805-1810
Transcribed by John A. McGeachy.

Pryor, William, and Peter Vest (unsure of their relation), settled in White County, Tennessee after 1810, with Pryor Vest obtaining land on Caney Fork in 1814 in an area later to be known as Sparkmantown in Van Burren County, which included the Dodson, Medley, Sparkman, Vest, and Simmon families.

You can see the Vess/Vest record history below.

YEAR	Name	Record	Location
1814	Pryor Vest	Land Record	Caney Fork
1815	Pryor Vest	Land Record	Caney Fork
1815	Pryor and William Vest	Tax List	Caney Fork
1816	Pryor and William Vest	Tax List	Caney Fork
1817	Pryor and William Vest	Tax List	Caney Fork
1818	Pryor and William Vest	Tax List	Caney Fork
1819
1820	Peter Vest	Census Record	Caney Fork
1821
1822
1823	Pryor and William Vest	Tax List	Caney Fork
1824	Prior Vasse and William Vass	Tax List	Caney Fork
1825	William Vest	Tax List	Caney Fork
1826	William Vist and Willis Vist	Tax List	Caney Fork
1827
1829
1830	Peter Vest	Census Record	Caney Fork
1831	Pryor Vest	Death	Warren County Jail (next to White Co)

*There is no evidence to suggest Willis Vest of Tennessee is the same as Willis Vess of Alabama; however, there is circumstantial evidence (see previous posts) to strongly suggest they are both of the same Vess/Vest family.