In 1806 President Thomas Jefferson sent cartographer Thomas Freeman and botanist Peter Custis to explore the southen Louisiana Purchase westward to the Rocky Mo

In 1806 President Thomas Jefferson sent cartographer Thomas Freeman and botanist Peter Custis to explore the southen Louisiana Purchase westward to the Rocky Mo

"The team of the "Grand Expedition," as it was optimistically named, was the first to send its findings on the newly annexed territory to the president, who rec

The surprising story of how Thomas Jefferson commanded an unrivaled age of American exploration—and in presiding over that era of discovery, forged a great na