This may not be of much help but try researching the slave narrative of Jane Sutton of Westville, Simpson County, MS, who was owned by the Berry family. After Emancipation, Jane lived with her former owners' son TALLY BERRY.
You may read Jane's narrative at this site:www.rootsweb.com/~msgenweb/xslaves/sutton.jane-xslave.htm
Have you found Dave Newsom in the 1870 and 1880 census records? I found him in 1900. I am wondering if Dave's family was using a different surname prior to 1900.
Linda Durr Rudd,
"Remembering Their Names"