bn:00063530n
Noun Concept
Categories: Units of the National Landscape Conservation System, Central Overland Route, Pony Express, Historic trails and roads in Kansas, American companies disestablished in 1861
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pony express  Charles Peck Thompson  Jack Keetley  Pony Express National Historic Trail  Pony Express Trail
EN
Express mail carried by relays of riders on horseback; especially between Missouri and California around 1860 WordNet 3.0
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Express mail carried by relays of riders on horseback; especially between Missouri and California around 1860 WordNet 3.0 & Open English WordNet
The Pony Express was an American express mail service that used relays of horse-mounted riders. Wikipedia
A 19th-century mail service delivering messages across North America by means of riders on horseback. Wiktionary