For those interested in such things, I have been trying to map Twain's travels associated with his 1868-69 American Vandals Tour. The University of Nebraska has a collection of kmz files for railroads up to 1870 and it is these that I have most relied on. Many segments don't have names and many are approximations of routes. It's not possible to accurately compare these with the USGS maps of the regions as the government maps are more recent and railroad companies have been unstable in regards to ownership and locations. Many of these reported railroads do not seem to be known to Google. I have often seen remarks on Mark Twain becoming fatigued/disenchanted with touring. Examining these maps may provide some indication just why this happened. He covered a lot of miles. I have divided the tour up into 6 arbitrary sections for my Twain's Geography site, mainly to lessen confusion with the maps. http://twainsgeography.com/content/american-vandal-abroad-1868-69