It looks like you started two nearly identical threads.
There has been a lot of discussion in this one: http://cs.trains.com/mrr/f/11/t/231756.aspx
Connecticut Valley Railroad A Branch of the New York, New Haven, and Hartford
"If you think you can do a thing or think you can't do a thing, you're right." -- Henry Ford
Bis repetita non placent - a famous sentence coines by Julius Caesar, meaning "I don´t like repetitions".
Search the web for "early era model railroading" or "civil war model railroading" and you will get what´s available in terms of information on railroads in the 1860´s to 1890´s.
Be prepared that there is not that much available.
You can model the 'cowboy era' with stacks, racks and SD70MACs - except that the cattle all move in 18 wheelers, and I've never seen them piggybacked. Of course, present-day cowboys ride the range in Jeeps and ATVs and wear team-logo baseball caps and jackets.
What you really seem to want is post-Civil War era (1869-1886) railroading. Punch that into a Google search for photos and you should trigger a landslide of useful information.
Chuck (Modeling Central Japan in September, 1964)