Martha's parents were John b NC and Winney b NC (may be Winifred, last name may be Langston) Stevenson. Martha was supposedly born in Terry's Creek MS, although this is not far from the LA line. John was buried in Washington Parish and Winney and youngest son John moved to TX with daughter Lucinda. Winney and son John are shown in WA parish 1850 census. Other siblings of Martha's are Cassandra, Anna, Mary, William (my line), Lucinda, and Susan. There may also have been a Simeon? We have not been able to go any further back, but William was born in SC in around 1814. The minutes of the Ebenezer Baptist Church which are on the Internet, show John and Winney joining in March 1820. I have a little more info if you want to email me.