UPDATE: All of our lithograph archiving needs have been met by a mystery man known only as the Lithorati. Go to the site  http://lithorati.com/   for the internet's best and most complete collection of images of all of the incredible lithographs from the NITL world tour starting in 2016. I have enjoyed attempting to make the "definitive" resource here for the last year or so, but my resources (and artistic skills) were pretty lacking. It was fun, but this new site is definite