I would not know where to start to look her up. I found that there apparently was a lot of Kuhls living in Illinois. She seems to be pretty old she may have just lived there.
The place where I get most of my photos generally has many from the same families, of course with different surnames most times.
Perhaps if you think she is related to your Kuhls, you could send me the other surnames related to them back in the 1800's and I can check my collection and when I return to the antique place to buy photos keep an eye open for those names to see if there is a connection.