I am am descended from Andrew Jackson Adair (1831-1911).A. J. was born in Henry Co GA, married Frances Gannt in 1857 in Marshall Co MS, and moved to Hays Co TX after Frances died in 1882.
I have a photocopy of a page from A. J. Adair's family bible on which is written:
James Adair and Ann Smith parents of A. J. Adair was married Feb 14th 1814 James Adair was born June 8th 1790 and Died March 22nd 1851 aged 60 years 9 months and 14 days Ann Adair was born May 17th 1789 and Died Oct 16th 1852 aged 63 years 4 months and 29 days.
Father and mothers sisters Adeline (Gant) Hargis - Born 1842 - Died 1912 Jane (Adair) Brooks - Born- Died
This would indicate that a Jane Adair who married a Brooks was the sister of James Adair, born 8 Jun 1790 in South Carolina, died 22 March 1851 in Memphis TN.Could this be your Jane Adair?