ALEXANDER C.M. PENNINGTON, brother of Dr. Samuel H. Pennington and of Jabez P. Pennington, Esq., was born in Newark, N.J., July 2, 1810. His father was Samel Pennington, a brother of Governor William S. Pennington, all being descendants of Ephraim Pennington, who came from England and settled in New Haven in 1643. At the age of sixteen young Alexander entered the United States Military Academy, at West Point, but at the expiration of two years resigned his cadetship, and entered upon the study of law. In 1833 he was admitted to the bar of New Jersey, and soon after began to practice in Newark, N.J. In 1837, 1838 and 1840 he was a member of the Common Council of that city. During the years 1837 and 1838 he was a member of the General Assembly of the State of New Jersey. In 1852 he was elected to the United States House of Representatives, and in 1854 was re-elected to the same office. For a number of years he was brigadier-general, commanding the Essex Brigade. In 1857, Gen. Pennington removed to New York City, where he continued in the practice of his profession until the time of his death, which, occurred January 25, 1867.