First, if it is a lithograph; it was almost certainly printed after the Civil War. Stone lithography was invented in, I believe, 1835 or thereabouts. It did not come into popular usage until the 1870s. The scene also appears to be a 19th century scene.
I can see equally your reflection and what is behind you versus the pic itself.
Can you find an artist's signature or is anything written on the back of the artwork?
Don...