Let us look at a few of the big distribution networks in the US that we use today. The US Post Office for instance is a huge complex chain of symbiotic relations ships with vendors to deliver by truck, work with FED EX for air, previously that airmail idea started commercial aviation. The reason it grew big and evolved so well is because of the special teams and companies and individuals from the first air mail carriers to the Wells Fargo Coaches. A much better system than Paul Revere; although he was very simple with only two possible signals 1 or 2