I don't know but I suspect that Mark Twain road this railroad more times 
than any other railroad.  I have created a page with the route and 
depots.  It runs from New York (Hoboken) to Buffalo, through Elmira.

http://twainsgeography.com/content/delaware-lackawanna-western-railroad

Some of the route is guesswork.  It is derived from Google Earth, kml 
files from the University of Nebraska and Wikipedia.  None of the maps 
I've seen show the road through Perkinsville even though the map of 
depots show the location of the depot and I even have photos of what 
remains of the depot.