History of Oceania

Who was a person that slave captain and signed the declaration of independence later became merchant in Portsmouth New Hampshire?

The person you are referring to is John Paul Jones. He was a naval officer in the Continental Navy during the American Revolutionary War and is considered to be the father of the United States Navy. He was born in Scotland and served in the British Royal Navy before coming to America. He later became a slave captain and signed the Declaration of Independence. After the war, he became a merchant in Portsmouth, New Hampshire.