This is not completely on point, but try: www.sanborn.com They are a company that creates maps that date back to the early 1800's for fire insurance. Some of the old town maps are still available. Freddy
If you join the GSSN, you might want to consider heading out their "Johnnie" claim north of Pahrump. Gold Basin has been hit very hard over the years, but the upside is you might also find a meteorite there.