The only known document in private hands signed by both legendary American explorers Meriwether Lewis and William Clark, the men who opened up the West for America after the historic Louisiana Purchase of 1803, is expected to bring $100,000+ in Heritage Auctions’ June 10 Legends of the Wild West Signature® Auction.

In July, 1803, the United States – at the price of four cents an acre (totaling $15 million) – purchased 828,000 square miles of land from France. The Louisiana Purchase was arguably the most important land deal of the 19th century, doubling the size of the United States and giving it control of the important port city of New Orleans.

Source & Full Story