So I'm reading Eric Foner's excellent 'Reconstruction: America's Unfinished Revolution'. In it there is a picture of the collective portraits of the members of the 1874-75 Mississippi Senate. There is one woman in the picture, a 'Miss Adies Ball'. I couldn't find anything online about her except a similar picture to that in the book in the below link:
http://www.loc.gov/pictures/resource/ppmsca.12860/
She can be seen in the sixth row from the top on the left hand column, at the right hand side of it.
Despite my initial excitement, I suspect that she wasn't actually a senator but something else as you'd expect there to be something online about her! Still, can anyone tell me otherwise?
If we look at her name in the image in your link, especially in the TIFF file, we see it says, "Miss Adie Ball, Post M." She was likely the Post Master, possibly for the entire Legislature. You see a similar situation of non-legislators at the end of the House members, where "Trotter, Ast. Serg.-Arms" and "Pease, Sergt-at-Arms" appear.