Sarah Petty Daughter of George & Lydia Petty was Born Sept 1st 1800.
↑ mentions a deed 30 Dec 1797 which says George and Lydia Petty were of Stockton, Union Co., South Carolina.  says George Petty was living near current site of Dover in 1798. These dates are consistent with Sarah's birth being in TN.
↑ Despite unanimity of my sources saying she d. 20 Mar 1826, I believe death date of 20 Mar 1826 applies to brother Elijah only. Sarah is mentioned in father's will dated 8 Jan 1838, as Sally Mallory, so she could not have died in 1826.