And what do you want to identify? The fact that this castle Shilon (Chillon), you've already figured out. That this lithograph - too. I should add that this is - photochromic lithographs, the first of them are on the website
http://www.old-picture.com/europe/Ch...e-Dent-and.htm
The author's original photographs reveal, I think, is impossible: too often photographed the castle from this very place. And there are postcards and even stereoscopic photos from the 1860's. Even Courbet wrote to the form of the castle, but without a sailboat.