John or Jack Henry may refer to: Wikipedia
John Henry is an American folk hero. An African American freedman, he is said to have worked as a "steel-driving man"—a man tasked with hammering a steel drill into a rock to make holes for explosives to blast the rock in constructing a railroad tunnel. Wikipedia
John Henry (November 1750December 16, 1798) was the eighth Governor of Maryland and member of the United States Senate. He was born at his family's estate (Weston), located near Vienna in Dorchester County. Wikipedia
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