19th Century Framed Print “The School Room” By Sophia Countess Of Leven RARE

This is a very rare framed print titled “ The School Room". It is marked “by Sophia, Countess of Leven 1834-1887" on the back of frame and on the back of the print itself. The frame measures 27"x16.5". I can’t find anything like this painting online and spoke with 2 appraisers who couldn’t find any information on it either which tells me this is very, very rare. The painting is combination of pencil and watercolor. It’s so detailed I thought it was the original but not so sure it is, regardless it is a very old print.
There is some information on Sophia, the Countess of Leven. Whether she is the actual artist or not is questionable although her name is certainly tied to this work of art in some way. She was married John Leslie-Melville, 9th Earl of Leven.
This is a satirical piece and a-lot of thought went into it.
Please let me know if you have any questions and will try to answer the best I can.
Here is some information on her husband:
https://en.m.wikipedia.org/wiki/John_Leslie-Melv