“The Spies Who Launched America’s Industrial Revolution” https://www.history.com/news/industrial-revolution-spies-eur...

“Among those sniffing out innovations across the Atlantic was Harvard graduate and Boston merchant, Francis Cabot Lowell. As the War of 1812 raged on, Lowell set sail from Great Britain in possession of the enemy’s most precious commercial secret. He carried with him pirated plans for Edmund Cartwright’s power loom, which had made Great Britain the world’s leading industrial power.

Halfway across the Atlantic, a British frigate intercepted Lowell’s ship. Although the British double-searched his luggage and detained him for days, Lowell knew they would never find any evidence of espionage for he had hidden the plans in the one place they would never find them—inside his photographic mind. Unable to find any sign of spy craft, the British allowed Lowell to return to Boston, where he used Cartwright’s design to help propel the Industrial Revolution in the United States.”