Today in History, April 3: 1860 – The First Pony Express mail is run. The riders would change horse about every 15 miles to cover the 1,800 miles between St. Joseph, MO and Sacramento, CA in an average of 10 days…lightning fast for those days. The Pony Express was romanticized and became the stuff of legend, with the likes of 14-year-old William Cody (Buffalo Bill later) making the run. It would only last until October of 1861 (about 18 months) when the first transcontinental telegraph line rendered it obsolete.