I don't know if this is still the case, but years ago I had a boyfriend who lived out in the country from a small town about 20 miles from the larger town I lived in. If we wrote each other letters (which teenagers did back then) it took as much as two weeks for them to be delivered. First it went to our PO, then to Waco, then to Dallas, then to Corsicana, then to the PO in his little town, then to his RFD box at their farm or vice versa. I got letters from him for a couple of weeks after we broke up!