ST. CLAIR, Arthur, a Delegate from Pennsylvania; born in Thurso, Caithness, Scotland, March 23, 1734 (old style); attended the University of Edinburgh and studied medicine; purchased a commission as ensign in the Sixtieth Foot, May 13, 1757, and came to America; served under Gen. Amherst at the capture of Louisburg July 26, 1758, and under Gen. James Wolfe at Quebec in 1759; resigned April 16, 1762; settled in Ligonier Valley, Pa., in 1764, where he erected mills; surveyor of the district of Cumberland in 1770; justice of the court of quarter sessions and of common pleas; member of the proprietary council, justice, recorder, and clerk of the orphans’ court; prothonotary of Bedford and Westmoreland Counties; served in the Pennsylvania Militia and Continental Army during the Revolutionary War; was a member of the Pennsylvania council of censors in 1783; Member of the Continental Congress 1786-1787, and its President in 1787; appointed governor of the Northwest Territory upon its formation in 1789 and served until November 22, 1802; named commander of Federal Troops, March 4, 1791; returned to Ligonier Valley, Pa., and engaged in the iron business; died near his old home, “Hermitage,” near Youngstown, Pa., August 31, 1818; interment in General Arthur St. Clair Cemetery, Greensburg, Pa.