Biddle. I. Clement, an American soldier, born in Philadelphia, May 10, 1740, died there, July 14, 1814. He was a member of the society of Friends, a descendant of an early Quaker settler and proprietary of West Jersey, and was engaged in commercial pursuits. In 1764 he joined in raising a military corps for the protection of friendly Indians against a lawless band called the Paxton boys; and in 1775 he was an officer of the "Quaker" company of volunteers raised in Philadelphia. In 1776 he was appointed by congress deputy quartermaster general for the militia of Pennsylvania and New Jersey, and took part in the battle of Trenton, and in conjunction with another officer was ordered by Washington to receive the swords of the Hessian officers. He also participated in the victory of Princeton, the retreat at Brandywine, and the enterprise of Germantown. During the winter of 1777-'8 he shared the sufferings of the American army at Valley Forge, rendering important service especially during the famine. After the battle of Monmouth he retired from the army (September, 1780). In 1781 he was appointed at the urgent request of Greene quartermaster general of Pennsylvania. In 1794 he served against the whiskey insurgents.

He was at the same time an active politician, urging the adoption of the state constitution of 1776, of which his brother Owen was one of the framers. After the organization of the federal government in 1787, he was appointed United States marshal of Pennsylvania. He was held in high regard by Washington, with whom he was in frequent intercourse and active correspondence. II. Clement Cornell, an American political economist, son of the preceding, born in Philadelphia, Oct. 24, 1784, died Aug. 21, 1855. He early entered the naval service, but soon left it and became a lawyer. The outrage upon the U. S. ship Chesapeake in June, 1807, led him to solicit military employment, and he was appointed captain of dragoons, but resigned his commission on the speedy settlement of this difficulty. In 1812 he raised a company of volunteers, called the "State Fencibles," and was afterward elected colonel of a volunteer regiment; but the retreat of the British from Baltimore left no opportunity for active service.

After the restoration of peace he devoted himself chiefly to political economy, preparing notes and additions to the translation of Say's "Treatise on Political Economy" (2 vols., Boston, 1821; new ed., Philadelphia, 1851), which were commended by Dugald Stewart. In the free trade convention in Philadelphia in 1831 he bore a prominent part; and, although occupying no public position, he contributed to mould the policy of the government with regard to the currency and foreign commerce.