He married Mary Rutherford, daughter of General Matthew Clarkson, and became prominent in the legal profession and public affairs. He was a member of the State Assembly in 1816 ; recorder of New York in 1818; a member of the convention which framed the constitution of the State in 1821, and for many years president of the New York Historical Society, trustee of Columbia College, etc. He received the degree ofLL.D. in 1831, from Harvard, and in 1835 from Columbia. He died February 20, 1843.

John Clarkson Jay, M.D., eldest sou of Peter Augustus, was born September 11, 1808, and married Laura, daughter of Nathaniel Prime. Heis the proprietor of the estate atRye,andthe present well-known representative of the family in Westchester County. After a thorough preparation in private schools, among which were those of the blind teacher, Mr. Nelson, and the IMcCulloch school at Morristown, N. Y., he entered Columbia College, from which he graduated, together, with the late Secretary of State, Hamilton Fish, and many other distinguished men in the class of 1827.'' In 1831 he took his degree as M.D. He has been a deep student of natural history, especially of conchology, and the valuable collection of shells, formerly in his possession, and which is now in the New York Museum of Natural History, having been purchased by Miss Wolf and presented to that institution by her, in memory of her father, has the reputation of being the finest in the country. On this blanch Dr. Jay has written several pamphlets, among which are the following : " Catalogue of Recent Shells, etc.," New York, 1835, 8vo, pp. 56 ; "Description of New and Rare Shells, with four plates," New York, 1836, 2d ed., pp. 78 ; " A Catalogue, &c., together witli a description of new and Rare Species," New York, pp. 125, 4to., ten plates.