Long before the days of motor vehicles, in ancient times, homing pigeons, runners and horseback riders used to be the fastest way to send letters and packages. According to some sources, foot messengers ran several miles to their destinations. In the middle ages, royal courts maintained their own messengers who were paid a higher wage than common labourers.
The word courier is derived from the Latin word "currere" meaning to run. Other words were also derived from currere