This nice gentleman told us all stories of when he worked on this mail car when he was about 18.
They'd sort mail for 12 hour shifts over several days as they were traveling to the next destination.
All the pay for soldiers was carried by mail train, and it was all cash. They got robbed often.
Finally, all the mail carriers were issued guns - there would be 12 workers on a 2-3 day shift.
That did put a stop to the robberies.

Jim was nice enough to let my nephew Will pose with him for a picture before we left.