?Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds.? That's the official motto of the U.S. Postal Service. Whereas it's chiseled in stone on New York's main post office, the USPS borrowed it from the ancient Greeks who coined it to praise their highly efficient and dependable horse-riding messengers. Man tried many other means of mail delivery: In the 1900s, cows hauled mail wagons in Europe. In the United States, camels were tested in Texas, New Mexico and Arizona. In Russia and Norway, reindeer still haul mail sleighs. And in Belgium, one city even tried cats, but many tended to stray. Still, nothing beats the U.S. mail for dependability. It's tax time and you can rely on the USPS! And that's the On The House tip for today.