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There were two physician signers of the Constitution of the United States of America: Hugh Williamson, M.D., LL.D, representing North Carolina and James McHenry of Maryland.
Few men have enjoyed so varied a career as Hugh Williamson-preacher, physician, essayist, scientist, businessman, and politician. He traveled and studied in Europe, witnessed the Boston Tea Party, participated in the Revolution, served as a U.S. Congressman, and numbered among the leading scientific authors of his day. In addition to all these achievements, he was one of the leading lights at the Constitutional Convention.
A soldier, physician, and politician who was one of several foreign-born signers of the Constitution, McHenry served as a surgeon and as an aide to Washington and Lafayette during the War for Independence; sat in the Maryland legislature and the Continental Congress; and held the position of Secretary of War in the Washington and John Adams administrations. Baltimore's Fort McHenry was named after him.
Honorable Mention goes to James McClurg, representing Virginia, who signed the Declaration of Independence and worked on the Consitution, though he left before signing that document. He pursued postgraduate medical studies in Paris and London and published Experiments upon the Human Bile and Reflections on the Biliary Secretions (1772) in London. His work and writings were well-received and respected by the medical community, and his article was translated into several languages. In 1773 McClurg returned to Virginia and served as a surgeon in the state militia during the Revolution.
Information gathered from "Signers of the Constitution" produced by the National Park Service and the National Archives.
Bird Library has a display for Constitution Day on the fourth floor. Come see us.