"Stations were built at intervals averaging fifteen miles apart. A rider's route covered three stations, with an exchange of horses at each, so that he was expected at the beginning to cover close to forty-five miles - a good ride when one must average fifteen miles an hour"

This quote by Buffalo Bill is describing the Pony Express, a mail delivery system that operated in the United States from 1860 to 1861. The Pony Express was a relay system of motorcyclists and steeds that lugged mail from one station to the next. The stations were built at intervals of fifteen miles apart, and each biker was expected to cover three terminals, or close to forty-five miles, in a single trip. This indicated that the cyclists needed to average fifteen miles a hr in order to finish their path in the designated time. The Pony Express was a hazardous and also difficult task, however it was a fundamental part of the interaction system of the moment. The Pony Express was ultimately replaced by the telegraph, but it remains an important part of American history.