this train has 3 freight cars in front of 4 baggage cars. Then the passenger
trail behind. The most important goods are on the baggage cars, the U.S. Mail.
Mail can also be delivered by just throwing it off a regular train as it passes, maybe at 20 miles per hour. Picking it up was accomplished by mounting the mail pouch to a bracket extended from a pole and a metal arm extending from the baggage car would grab the mail pouch.