'X' was an apprentice to Jedediah Strutt, a partner of Richard Arkwright, in England where he gained a thorough knowledge of cotton manufacturing. He immigrated to the United States in 1789, attracted by the bounties offered there for workers skilled in the manufacturing of cotton. With his detailed knowledge of textile machinery, financial backing from the Rhode Island firm of Almy and Brown, and the assistance of skilled artisans, he constructed versions of Arkwright’s spinning and carding machinery and established the first successful cotton mill in the United States. Identify 'X'.