 The Butterfield Overland Mail Stage Line  was a stagecoach service operating from 1857 to 1861 of over .It carried passengers and U.S. Mail from Memphis, Tennessee and St. Louis, Missouri to San Francisco, California.The Butterfield Overland Stage Company had more than 800 people in its employ, had 139 relay stations, 1800 head of stock and 250 Concord stagecoaches in service at one time.