Yes, forgot to mention that it has to be an 1870s copy. After about 1875 as Jim notes.
I'm not sure I'm seeing overpainting though. An older photo copied without a negative had to be rephotographed, resulting in loss of clarity. Retouching or overpainting was often done. Jim if you're talking about her eyes, I'm not sure the eyes are overpainted. But I wonder if she might have been tubercular, which can give the eyes a dark, sunken look. So can hepatitis. Just a thought.
Cheers,
China