Finding Mattie Powell
However, that reminded me to go to what I refer to as the Golden nugget: familysearch.org Thanks to https://beta.familysearch.org/ I have found many of my and other families information. This site also helped me to discover that they were married in 1879 and her last name was Powell.
There are of course two negro Mattie Powells nearest Meriwether county fitting the description but both are pretty far away 80 and 90 miles or so. So I am still on the hunt but happily so.
Update: Found a Mattie Powell and family that match pretty closely.